Its different tradeoffs. Depending on your exposure. 

With liquid you're trusting the federation will let you exit when you wish to do so. 

With lightning you're trusting (Depending on your set up) just your channel partners and/or the LSP to not deny you service or pinning attacks. 

So each has varying degrees of trust,  all depends on your level of tolerance for said funds.  nostr.fmt.wiz.biz