There are other coins on the market with high stake rates of 20% APR and above.
There is no trustable and stable altcoin that had a high APR of 20%. Everything close to 10% annually is more than great, don't believe in fake statistics. Maybe you can get 20% of some coins, but without calculating inflation.
When you convert profit to fiat or Bitcoin, it is always much less than 20% and often be a negative amount.