If i remember it correctly you need significant amount something like that for each leverage.
Significant amount of what? Hope not money? Traders should trade with the amount they can afford to lose.
Certain traditional derivatives platforms, mostly to do with stocks and other markets, don't want retail traders. So they require one to have a huge amount of equity. For example, if it was offering trading Bitcoin futures, the minimum order size would be one contract and 1 Contract would be equivalent to 10 BTC
This would definitely not favor retail traders.