I agree that the most that will benefit in staking are those with larger funds. But this doesn't mean that it's only limited to them, if you've got spare altcoins that can be staked and you'll just hold it, then it's better to stake it into a platform whom you trust. So while you hold it, you'll be adding quantity on it by just holding it as you stake rather than holding it alone.

Of course bitcoin should be the first on the list. But if you're keen into staking, there are too many platforms out there to choose from. I've actually made a suggestion about it for example, you want to stake ETH.