Totally forgot about bitvest; tried it only shortly because the returns were super low during that time.
Better avoid bitvest unless you are okay with long waiting period with no clue whatsoever, hot wallet not replenished is one of the main issue that people face on bitvest.
Bustadice and Bustabit can be trusted but bankroll investment can be double edged sword so DYOR and come into a conclusion.
Yep.
What would happen if the platform in question would just.. Close?

Better to be safe and stable, but still afloat.