Do we all know that most of the real causes of losing in trading is because some traders have little or no knowledge on trading or what they are doing in the market, they just enter a trade blindly hoping it goes their way, and when it starts going against them they start praying.
I have seen someone shorting a trade because he felt that the market has bought for a very long time, and when he did that, he was liquidated of the $30 he used in that trade because he didn't even know how or where to set his stop loss, so trading blindly is one major factors that cause losing in the market this days because when you know what you are doing, even if the market is going against you, you wouldn't panic as long as you use an amount you are willing to lose.
Using an amount that you don't care about for trading shows that you already have risk management skills because you know this could go wrong for you and with no knowledge about crypto and their PA we can lose so why not just trade with little amount and test it.
Although a newbie can start trading with $10 but $30 is also not a big amount and it will be a lesson for that trader to start learning first and then practice. Some people think they can easily understand it if they will just start it instead of theocratically understands it but they don't understand crypto don't work like that.