What will be your advice to someone that just know about crypto now and just want to start and made good money out of it? And how many years will it take?
A decade, around 10 years, of market wisdom, observation, questioning, patience, lessons will be required to fortify your mind, understanding. Becoming a legitimate success is similar to obtaining a black belt in martial arts or obtaining a PhD. You can't replace time or fast forward it or enable cheat codes, hacks.
Start small, learn daily, and never invest more than you can afford to lose. Focus on long-term value, not quick gains. With smart strategy and patience, it could take 2–5 years to see solid returns.
Honestly right now is not the right time to learn about crypto since we're already in a bullrun. But the good thing is the bull run isn't over yet. If I had some savings right now I would go long on Ethereum. It is the safest altcoin and it has 3x potential. But if you do buy a crypto, set a plan and stick with it.