Honestly, I am not familiar ir heard of blockbank project. Anyway, If you are not sure about it then you should avoid buying it. Did you try using domain checker and see if it's an old website or a new website that you cane across. If I were you, I'd stay away from that project since I did not heard about it.
First time as well I'm hearing about blockbank. The lack of notoriety isn't a good signal for this project. They offer up to 24% APY on their native token BBANK, what isn't a good signal too. I think they want to copy business model from Crypto.com and NEXO, and since it's the goal of OP to look for such investments, why don't go for one more popular and notorious already?
This blockbank seems too sketchy. If you look their Twitter you will see they are distributing 100$ in their native token for people asking them the best questions. That means their token has no value to be distributed like this.
I think interesting they offer a Visa debit card, though, and I ask myself if that is for real.