The big news in tech this morning is a new a16z cryptocurrency-focused fund totaling some $2.2 billion. The new investment vehicle is worth around four times what the company’s preceding crypto fund — its second — was worth. Andreessen’s wager on cryptocurrency is only accelerating over time as the investing house raises larger funds focused on the market with less time between them. The Exchange explores startups, markets and money. Read it every morning on Extra Crunch or get The Exchange newsletter every Saturday. It’s not hard to see why a16z…