Does it matter if a token provide 10% APR when it fall 10 times or loose 98% value in two years. Ironically, even if start growing from its bottom (Say it dropped from $1 to 2 cents) at 10%, it will take 32 years to reach its initial value.

The bottom line is that if one buys the token at a certain price (say, $1). And it keep growing at 10% and in 32 years, it will be 20 times higher (e.g. $20).

In most cases, these PoS tokens goes to oblivion since they don't have any intrinsic value. It requires continuous number of suckers to buy the tokens forever which is not possible.

SMARTCash (SMART) is an example of such sucker story. Anybody could buy a Masternode with 10K SMART which provided (20-10%) APR.

It's price crashed from all time peak of $2 to 0.4 cents. Now think of the investors who bought it above $1 or even 20 cents. They will die or their progenies will die, but will never see ROI.

The smart answer is that if that token has good chance to go higher from one's buy point then all these APR makes sense.

Steem or LEO's PoS APR is a good selling point only if it has a good chance of appreciation. Due to utilities of Steem/LEO, they have intrinsic values and will be appreciated in the future.

However, any crypto or token that provides 10-20% APR that does not any intrinsic value due to utilities is probably a ponzi scheme and there is a very good chance that it will collapse in value. A high school kid can create or fork a PoS token and ICO it, then provide 10-20% APR. It will soon die or collapse.