The safest wallets are hardware ones. If you can't afford it, take a look at non-custodial mobile or desktop apps. I use Ownr wallet, it's relatively small and less known than Bluewallet or Samourai, but still reliable.
Why exactly should a new closed-source wallet be reliable?
I'd never recommend a closed source wallet over samourai or electrum.
And there are other (cheaper) ways than a hardware wallet to store coins securely.
With an unused device, an air-gapped wallet for example. Or a paper wallet. Both of them are kind of impractical when it comes to frequently transacting, but are definitely secure if managed properly.