It should be done responsibly, especially in the early stages of a person's journey.
It's very easy to lose your first funds on some positions that wouldn't have many markers for them, yet you would blame everybody besides yourself for it.
In the end, what matters the most is the determination and risk management, in my opinion. They bring both experience and profit in the long run.
When they can learn from every experience they get, that can give them more wisdom to use their funds to trade. They can manage their funds better and know many things about trading. They will gets more experience by practicing their lesson and know how to fix the mistake. Becoming a pro trader will not easier but if they want to learn more, they will have that chance. The thing is not many people are willing to do that and only rely on other people to trade.
A trader must be willing to learn more, everyday. Yes, the charts, the markets, they're all unpredictable and knowledge that we have is continuously gaining based on how we're actively learning from all of that.
I agree, that a trader even though he's profitable needs to stay humble. No need to brag for some profits or whatnot, all you have to do is be consistent.
But if you can't help yourself but wanting to brag that out, then all you have to do is prove yourself then based on your experience and how profitable you are.
By learning everyday, he will know how the market moves and how to react with the current situation. They needs to add more knowledge about trading so they can use it in trading. They can not just predict where the market will moves but they need to analyze many things before decide.
When a trader can feels that he needs to learn more, he will not feels that he is a pro trader. He will want to improve his skills because that is something that will helps him to trade better.
We don't have to brag our skills and show to many people but keep it to ourselves. Sometimes that can makes our life calm and we can trade without any disturbing from other people. We can trade anytime we want and analyzes the market with our skills.