If Ethereum's supply is infinite, why does it enjoy a $112 billion+ market cap?
because of the following reasons:-
1-Popularity with a market cap of $715m, considerably smaller than Bitcoins $12.4bn, Ethereum, even if young, already reached the position as the second most traded currency after Bitcoin. It is worth mentioning
2-ETC is the third most traded cryptocurrency
3-It's low value of Ethereum (1 ETH=$8.24) makes it easier to trade
4-It's Stability. Ethereum had an organic growth, without massive spikes, and it seems to be stable, if not even predictable