Do you trust trading 212?

I really love trading 212. Was going to spread out to lightyear after i reached 20k on 212, but lightyear doesn't seem as reliable (their site claims they pay out 2.99% interest in some fund vault, yet i can't find this easily, either I'm being stupid or their marketing is tricky..). and i think i prefer to go over the insured amount on 212 instead.

Anyone shed any reason why not?