Inflation benefits borrowers more than hoarders. Your example is strange because in the one you compare a base currency to economic activity in that currency and in the other you take a loan in one currency in order to transact in another. If you borrow bolivars to start a Venezuelan corner store, at least your debt would lose value as rapidly as the currency you receive from your customers. If the price of BTC continues to rise indefinitely, you would be in for an even worse time if you borrowed BTC to start your Venezuelan corner store.
I also don't see how infinite divisibility helps. It's still deflation. Let's say the world converts to BTC. Now if I take a loan of 1 BTC to start my corner store, the value of that 1 BTC will continue to increase, but if the goods selling do not increase in price, I will have to charge less and less for them over time. There's the same amount of space between 1 and 0 as there is between 1 and infinity.