Blockchain does not make banking obsolete. We can already do business by moving raw currency around, but hardly anyone does that. There is a whole crypt banking sector that provides exchanges, custody, lending...
And if you take inflation overhead, consumed by miners and other services to keep BTC or ETH running (5% to 10% annually), there is not much advantage over existing banking.
And if you take inflation overhead, consumed by miners and other services to keep BTC or ETH running (5% to 10% annually), there is not much advantage over existing banking.