18% is quite a high number, if it is in the form of USDT, I think more people will use the service than having to make a deposit in the bank... but if it is a cryptocurrency coin or altcoin, it is still within reasonable limits, because there is still tolerance for anticipating volatility that could fall deeper, causing profits when converted to FIAT to be unsatisfactory.
I prefer to stake on some events, for example airdrop on binance or other trusted platforms. It brings instant and repeatable profits.