For me, my first impression of margin trading is the danger to investors' assets. It is really a hard game and is hunted by many whales. Sometimes many people bet a lot of money, the whale can see that command and start manipulating the opposite. That's why so many traders disrupt what margin trading is. I do not encourage people to participate in this type of transaction.
Whales manipulate every trading market. You just have to follow the ride and have enough assets from both sides to be able to follow their trades. This is tough and very likely would lead to a loss for any newbie trader. Whoever goes in with the idea of making easy money from margin trading is definitely going to lose, be it whatever enticing offer that a broker might be giving them.
If you care about your money and dont have prior experience of making money from margin trading, by all means dont risk it.
When it comes to crypto currency trading, margin should never be applied and I dont know why some platforms are encouraging marking when they know the market is always manipulated and there can never be an assurance that margin trade will be safe with hem.
The only market where I can ever advise people to go for margin trade is onforex trading because there is less volatility and market is not that much manipulated in forex. Margin trade can really make any dude so much money when it is used successfully, but its application is more like gambling and the chances of winning to losing is 50:50.