Sort:  

I've made a Bitcoin futures exchange, one of the first. But I shut it down few weeks after launching alpha, as I didn't want to put customers' funds under risk (it was a typical centralized exchange with all the associated risks).

Coin Marketplace

STEEM 0.17
TRX 0.24
JST 0.034
BTC 96459.90
ETH 2752.56
SBD 0.67