100x leverage is actually nothing compared to CME futures, it's just that Bitcoin moves a lot more in % terms than the S&P500 does.

A lot of brokerages out there will let you open a micro E-mini S&P500 contract with a margin of $50. The contract is worth 5x the S&P500.

That's a notional position value of $30,235 for only $50. Roughly 604x leverage.