It is easy to get 10-15% ANY return rate, but the problem is that you will get that percentage in the form of altcoin and the value of this token/coin may decrease, or you may not be able to withdraw it, or it requires a large capital that makes the risk of losing everything very possible.
Therefore, instead of looking for an easy, unguaranteed profit, it is better to learn trading, as it can easily enable you to achieve a good profit, or at least DCA, for Bitcoin during the next 24 months.