What would the credit market be like in a world where only bitcoin/non-fiat currencies, i.e., finite currencies, existed?

Considering that most nations grew based on loans and that practically all economic growth was founded on this, credit is essentially the creation of money out of thin air.

If there were only one currency that appreciates over time, what would be the incentive to lend it? Would there still be loans, or just monetary exchanges? How would the economic growth of nations be? Would it be slower globally? Would there be less distribution and access to credit universally? Would people have less access to financial resources?

I haven’t found much debate on this topic. If anyone who understands the mechanics of credit and bitcoin could help me, I would appreciate any comments. This is a research topic I am exploring.