Bitcoin made insane profits since the beginnings. If you really want to go for such high rewards, you need to go into Alt coins, but there risk there is very high too. There is a good chance you will lose money. If you do want to be long term involved with crypto currencies I would advise you to go for Bitcoins. They might be very high at the moment, but there are already experts saying that prices of above 100,000 USD are possible for 2021. Buying to hold is a better approach than abitrage bots for beginners in my opinion.