If that happens, then what's the investment purpose of bitcoins if we let the banks do it for us. Sounds familiar? Yes, because that's what we do with fiat money. We give them our money so they can invest it for themselves and give us profit on a tear drop scale.
It seems that you have a good point here, my friend. If we let banks take control of our own Bitcoin, then wouldn't that defeat the whole purpose of cryptocurrencies? Bitcoin was designed to let people gain control over their own money by simply eliminating the middleman. And if we trust another entity over our money, then it would be the same as fiat currency.
Therefore, while the idea of Bitcoin deposits sounds good in the sense that you'll be able to multiply your capital in the future, it has its risks where you could easily lose control of your hard-earned Bitcoin simply because the bank would have the private key under its control. Maybe sometime in the future, we would experience a service where we control the private keys, while we earn interests from our Bitcoin deposits over time. But until that happens, it would be safe to just hold onto our Bitcoin and watch our profits grow as the price rises to the moon.
