Prices for coins are volatile and will not always rise. Therefore, 100%, 500% or more ROI through rewards is only interesting if the coin is not losing its value. Even 500% or more will not gain you much if the coin only has 1% of its original value within a couple of weeks.
Cake DeFi, we carefully consider a different set of coins as we want to offer a range of coins, some with higher returns, but therefore higher risk, and some more settled and sustainable masternodes so you can choose and diversify your risk exposure.
Noteworthy is also that ROIs can change and is not the most important factor. Please consider other factors such as Team, Community, Purpose, Liquidity when choosing your staking coin.