How do staking pools keep the coins secure?

i'v been reading on staking for a while and willing to put few coins in but i'm having huge concern about the security/uptime , i considered doing solo and having an AWS node running but the idea involves its risk as i'v read on several blogs.

let's say i use a pool, can pools guarantee that the funds will be safe enough without any launch fiasco as POS goes live ?
will they use a different approach than solos do?