is silvers market cap only at 15 Billion USD?
Closer to $22B
1 tonne silver is about US$725K
There are about 30K tonnes in reserves
(and over 1M available to be put in reserves so real number is closer to $800B)
Maybe he is just considering american eagles.
And only considering one aspect of Bitcoin.
30K tonns is the US silver reserve.
Total world reserve is 540K tons which equals about 450bn market cap.