It may seem so at the first glance, but such trading if carried out by many independent providers actually increases the liquidity if the market for everyone else.
Likewise with crypto. Personally I don't think that if you're calling an API over an Internet it matters if your trading bot is written in go or python (mine was in python). Use the language you're most comfortable in. The network and trade submission/execution at your broker will be 10x slower than your bot anyway. Unless the size of your operation approaches the size where you can get direct market access which seems to be reserved for big forms only.
Likewise with crypto. Personally I don't think that if you're calling an API over an Internet it matters if your trading bot is written in go or python (mine was in python). Use the language you're most comfortable in. The network and trade submission/execution at your broker will be 10x slower than your bot anyway. Unless the size of your operation approaches the size where you can get direct market access which seems to be reserved for big forms only.