Saylor is exploiting the unfair fiat system. As a company he has access to very low interest rates, he takes loans against the stock and buys Bitcoin. As long as Bitcoin increases in value against the loan, he can buy more Bitcoin with more loans. To wreck him, they would have to raise interest rates to a level that would crush the economy. As long as the fiat Ponzi continues MSTR keeps growing. 

Plebs don't have access to interest rates as low as MSTR, so will be priced out. 

This is the current fiat system for all assets. Saylor a exploit, especially if it catches on hastens the end of fiat, but will result in Bitcoin being accumulated disproportionately by the current oligarchs. 

I prefer a gradual transition away from debt based money to equity by holding Bitcoin without debt.