[bisq-network/proposals] Filtering inactive assets (#41)

[Manfred Karrer]

Related to the [earlier proposal](https://github.com/bisq-network/proposals/issues/35) I would like to discuss the policy for filtering inactive coins.

**I would suggest those criteria:**
- If an asset was added in the last 120 day it is not subject for filtering (warmup phase)
- If an asset was never traded it will be marked as inactive
- If an asset was not traded more than `minNumTrades` and if it did not exceed `minTotalTradeAmount` it will be marked as inactive

The question is which values we should apply for `minNumTrades` and `minTotalTradeAmount`.
I think `minNumTrades`=10 and `minTotalTradeAmount`=1 BTC would be reasonable thought that would lead that we remove most of our assets (only 4 remain). So I think we need to be more tolerant here and rather use `minNumTrades`=3 and `minTotalTradeAmount`=0.01 BTC. Those values can be changed over time on

When an asset is marked inactive it is not displayed in the payment account combobox as well in the currency selection in the settings (already selected currencies will stick there). An account with an asset which got deactivated is still valid and can be used. As well offers and trades can be continued. So there is no hard filter. It would make all much more complicate otherwise and would also create more discussions from people who have created an offer and cannot use it anymore. 

Beside the filter by inactivity there will be a possibility to vote for removing an asset once the DAO is live. 

One open question is how we support re-activation of an asset.
One option would be that a BSQ fee has to be paid to give the asset 120 days warmup phase again.
Assets removed by DAO voting cannot be re-activated anymore. 
 

Here are the list of coins which would remain if we use `minNumTrades`=3 and `minTotalTradeAmount`=0.01 BTC and apply it to the last 120 days:

Sufficiently traded assets:
Bitcoin Cash (BCH): Trade amount: 7.2513 BTC, number of trades: 21
Bitcoin Clashic (BCHC): Trade amount: 0.01 BTC, number of trades: 1
Byte (GBYTE): Trade amount: 0.03 BTC, number of trades: 1
Dash (DASH): Trade amount: 0.403 BTC, number of trades: 3
Decred (DCR): Trade amount: 0.20 BTC, number of trades: 1
Ether (ETH): Trade amount: 7.38 BTC, number of trades: 17
Ether Classic (ETC): Trade amount: 0.045 BTC, number of trades: 2
Gridcoin (GRC): Trade amount: 0.0141 BTC, number of trades: 2
Litecoin (LTC): Trade amount: 0.4397 BTC, number of trades: 6
Monero (XMR): Trade amount: 706.2912 BTC, number of trades: 932
Namecoin (NMC): Trade amount: 0.11 BTC, number of trades: 3
PIVX (PIVX): Trade amount: 0.10 BTC, number of trades: 1
Siacoin (SC): Trade amount: 0.0609 BTC, number of trades: 2
Siafund (SF): Trade amount: 1.09 BTC, number of trades: 1
Spectrecoin (XSPEC): Trade amount: 0.642 BTC, number of trades: 7
Unobtanium (UNO): Trade amount: 0.049 BTC, number of trades: 3
Zcash (ZEC): Trade amount: 0.20 BTC, number of trades: 1
ZenCash (ZEN): Trade amount: 0.2224 BTC, number of trades: 4 

Insufficiently traded assets (would be removed):
Burstcoin (BURST): Trade amount: 0.0081 BTC, number of trades: 2
Obsidian (ODN): Trade amount: 0.0012 BTC, number of trades: 1 

Not traded assets:
10grans (GRANS)
AchieveCoin (ACH)
Angelcoin (ALC)
Arto (RTO)
Better Betting (BETR)
BitDaric (DARX)
BitZeny (ZNY)
Bitcoin Gold (BTG)
Bitcore (BTX)
Cagecoin (CAGE)
Cassubian Detk (CDT)
Conceal (CCX)
Counterparty (XCP)
Creativecoin (CREA)
Cryptonite (XCN)
DSTRA (DST)
Dai Stablecoin (DAI)
DarkNet (DNET)
Decent (DCT)
DeepOnion (ONION)
Devcoin (DVC)
Diamond (DMD)
DigiMoney (DGM)
Dinero (DIN)
Dogecoin (DOGE)
DynamicCoin (DMC)
Ellaism (ELLA)
Espers (ESP)
Exceed (EXC)
GeoCoin (GEO)
Infinity Economics (XIN)
Instacash (ICH)
Internet of People (IOP)
Internext (INXT)
Koto (KOTO)
Kumacoin (KUMA)
LBRY Credits (LBC)
Lisk (LSK)
LitecoinExtreme (LCE)
MFCoin (MFC)
Madbyte (MBYT)
Madcoin (MDC)
MaidSafeCoin (MAID)
Mazacoin (MAZA)
Mycelium Token (MT)
NEETCOIN (NEET)
Nav Coin (NAV)
Nilu (NILU)
NuBits (NBT)
Nxt (NXT)
Octocoin (888)
Particl (PART)
Pascal Coin (PASC)
Pepe Cash (PEPECASH)
Phore (PHR)
Pied Piper Coin (PPI)
PostCoin (POST)
Pranacoin (PNC)
Qwark (QWARK)
ROIcoin (ROI)
ReddCoin (RDD)
RefToken (REF)
Ringo (RIN)
SOS Coin (SOS)
STEEM (STEEM)
Safe FileSystem Coin (SFSC)
Semux (SEM)
Sibcoin (SIB)
SpeedCash (SCS)
Stellite (STL)
Strayacoin (NAH)
Tamadcoin (TMC)
Terracoin (TRC)
The Movement (MVT)
Ubiq (UBQ)
Verify (CRED)
WACoins (WAC)
WILD Token (WILD)
WorldMobileCoin (WMCC)
Wownero (WOW)
Xuez (XUEZ)
Yenten (YTN)
Zcoin (XZC)
vDinar (VDN) 


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