I have a friend who only operates with BTC, and most of the time he takes exchanges like Bitmex to do it, taking into account that arbitrage in Bitmex is quite tolerant on many occasions, when you have information about the liquidity pool it is possible to do small scalping that They can make a profit, by reviewing the BTC chart you can make short-term predictions where you can earn a lot of money, at least that is what he does, the trick for him is to put a lot of money in each operation, because if it is done With little money it is difficult to see the profits, even so it represents a great challenge for me and to have a lot of knowledge to get to do something like that. The only BTC trading I do is buy fractions of BTC and wait for it to go up, which usually happens almost always.