Soldato
Am I misreading your post ?
1 Btc is currently about £23,500, 21 would be worth currently £495,000 ish .. $630,000 ish not $500m ( about £390,000,000)
At Btcs absolute high of around £51,000, it would be just over £1m, a nice amount yes, but a small percentage of £390 million .
Your right I forgot it was $M they were claiming and not $K
Looking more I think most of the claims on his wealth originate from Tate himself and are probably pumped up significantly as part of the act