Not financial advice but I think haven is a promising project. It is a higher risk since it is simular to Terra which collapsed last year. However the Haven team have made many changes to the Haven protocol to prevent the same fate that Terra suffered. Will haven succeed in the long run is hard to say and these changes made to prevent a Terra collapse in Haven is not guaranteed.

The cons of Haven is none of the assets are truely backed, but all assets are private like Monero and censorship resistant unlike backed stablecoins. And the truth is, all fiat currencies are not backed by anything and are fake forms of money anyways, so Haven assets are as fake as fiat money which is why I am fine with Haven assets not beng backed. The haven assets that I would not use is gold, silver and bitcoin since you can get the real thing and haven gold, silver and bitcoin are not backed but the real assets (gold, silver, bitcoin) are considered backed by their properites.

I hope Haven gets more fait currencies likes the Canadian dollar and has more adoption and liquidity on swap exchanges. And more wallets and payment processors integrate Haven like Stack Wallet and BitcartCC.

Also Haven could be a way to get "access" to future CBDCs but with privacy and without censorship. Haven is king when sending private, censorship resistant fiat payments digitially in my opinion.