Let's be honest here. The people recommending Unstoppable Wallet do so because it's open-source. That's it. They have done none or very limited testing. I am not saying it's bad, but it's a very weird product that I personally didn't like.
It is difficult to find an open source, well-reviewed wallet that collects most of all altcoins in one place. You can find good wallets for the main blockchains, and then buying a hardware wallet is a better option for 90% of altcoins. Sometimes laziness is the motivation for people to download a wallet with the largest number of altcoins. some altcoins may need to be upgraded and forked, I read some stories that have tokens that have been frozen or burned and they do not realize that, unless you have time to follow news about altcoin, try to avoid investing in them.
I don't think a wallet service that describes itself as a decentralized wallet is trustworthy or worth downloading.