The short version
22 companies supply this market — deep enough that no single failure threatens the supply. The price has jumped 30% in a year, to $0.2204 per unit — sharp rises like this often mean supply is already tightening. Put together: this looks like a healthy supply — the boring kind, which is exactly what you want.
The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.