Well, this leverage addition is not necessary, because my statement was in their (Forex/Crypto) simplest states, with respect to their volatility. You, adding leverage to it will only distort that, and mind you, volatility and leverage are not the same thing, so I know the reason why I limited my point to volatility, as leverage reference is an additional risk.
Regardless, with all parameters being equal, use the maximum leverage for your trade in cryptocurrency and the same with your trade in Forex and see what I mean. It's obvious that your trade in cryptocurrency will liquidate way faster. That's the power of the volatility I mentioned, all conditions being equal (without leverage interference).
I am not saying that you are wrong, I am only saying that both are very risky because of people's mindset. Someone with $100 may not go for 1:10 but instead go for 1:1000 or more in forex, while many forex traders are going above 1:1000 up to 1:3000 or more when they are newbies.
I can have $500 on my crypto account on an exchange but use $50 to trade a shit coin, that is because I understand how suddenly a less volatile boring market can be volatile in a way that 1x leverage can get my account liquidated on long or turned my money to nothing on short in just few minutes. I can trade bitcoin with just 1x leverage.
All these have to be considered in both forex and crypto. I know you talked about what they are, crypto is more volatile which I did not against but I said for traders, trading is more than the volatility that you talked about. When they started to trade will be when they will know how trading is generally risky.