If I were a bank, I'd stay far away from any non-bitcoin cryptos that I'm not an issuer of. Why would I want to own a coin that someone else is able to freely devalue, in addition to conventional currencies? On the other hand, if I were a bank, bitcoin presents a compelling argument. The supply is finite. Disclaimer: I don't own any crypto or bitcoin.
I'd stay away from BTC too, its poor environmental effects invite regulation and they have no plan to pay for chain security in a way that scales as issuance drops off. If you like the "limited supply" thing (I don't) you might be interested to know that other chains exist that can even have negative issuance, and while there is a plan to eventually stop issuing BTC, right now the supply of BTC is actually increasing…
Bitcoiners I talk to either haven’t gamed out the long term, plan to sell before then, or have some wishy-washy story about how Coinbase et al. will mine as a loss leader to keep the industry running.
1: https://bitinfocharts.com/comparison/fee_to_reward-btc.html#...