if i have to i would pick the IOST as its cheaper right now, collateral wouldn't cost much for it compare to those expensive tokens already.
I also want to mention Spectrecoin (XSPEC) again. Even though it's a project that's almost 3 years old, it's practically a whole new coin since the new and unique Proof-of-Anonymous-Stake algorithm was developed and launched in May 2019.
Solid staking coin with multiple privacy features (including ring sigs, stealth addresses, integrated Tor+obfs4), declining inflation, decent exchange options, and smart developers working on more wallet options and privacy improvements for the roadmap. Also easy to setup and keep updated for staking on a raspberry pi.
XSPEC is a great coin, price started i believe was about 0.02USD and still holding on today to more than $0.30. were they the first to introduce that Proof-of-Anonymous-Stake? not sure what it really meant though but even with DASH and few others, there is no mandatory to submit documents to stake coins.