No you shouldn't do this, don't trade demo. Trade with a small account instead or trade pennies instead of trading with a demo account.
Why? Because with demo, you have no emotion and attachement to the trades. You will trade without fear or greed and basically can easily turn a 100K demo into a million.
Then you deposit your entire savings and end up blowing them. Why? Because the game changes when its real money on the line. So open a Bitmex account, fund it with like $10 and trade with $1 units, you will never go broke this way.
He wants to trade without losing then i suggest the demo trade.
I also already try option trade like IQoption, if you try to trade with real money like 10, 20 or maybe 30$ just throwing money to them. The minimum trade was 1$, the good management you trade with under 1% from you total balance, a few bucks total amount trading can't really control the money management. If you already doing a trade on crypto about emotional & psychology i think everyone already knows about it, in that case, that's why I'm not explained about that.
Brokes its a different situation, in crypto or trading option i also got broke but it all depends on which money i used to do a trade. Most of the money i used for kind of trade/investment was come by my freelance earning. Went i lose it, I'm just thinking just wasting all my time went do freelance jobs. My real-life financial was not really getting the impact because of that. Used free money, not from your main money went you used it's for economy financial to avoid this kind of problem.