In short:

1. You must find a tutor or someone which have time in trading. They do studies of the markets and make predictions which some time go well and some times go bad.

2. Seem thing for the cryptos but here the problem is more difficult. If for the fiat money there are indicator that really can help to do predictions with a certain of veracity with the cryptos the problem is that the signs are to few. So it's more difficult to do trade.

But in both cases it is important the tutor. The re groups of people organized that do such things. Try to be in contact with them.