There are people who have learnt how to trade, practiced on demo accounts for long but have not had the money to try trading on the market, and so they have abandoned trading to try search for money first. While there are others who have too little income, that they cannot profit from the market trading, they are always worried about loosing and because of that they make mistakes with their technical analysis and end up loosing the little money they have.
I think trading is not for everyone.Because if someone does not have money, even if he is experienced in trading, he will not be able to trade even if he wants to.Similarly if someone has money to trade again but he doesn't know or understand anything about trading he can't trade even if he wants to.So you have to have both ability and experience to trade otherwise you are not suitable for trading.
Should trading be exclusive to financially comfortable and rich because of how risky it is?
I don't think trading is financially comfortable because we have to take a lot of risks while trading. If you buy a coin and start trading, you don't know exactly whether the price of this coin may increase or decrease. If the price of the coin increases then you are financially self-sufficient otherwise if the price of the coin decreases then you will suffer financially. Moreover, those who dream of becoming rich through trading are dreaming wrongly.