Saylor crypto imitators are now under pressure as doubts grow about their business model

Enthusiasm for Michael Saylor's Strategy (MSTR) — and some of its numerous imitators — has been fading, with the stocks for some of those companies tumbling over the past month. Strategy's stock has fallen roughly 4% in that time, underperforming bitcoin, which is up 3% over the past 30 days. The …