It depends a bit on the amount of money you are looking for. As a successful trader it should be easy for you to convince potential investor to give you some money. I would recommend you to make a summary of all your successful trades over the last few years. Best would be to make PowerPoint presentation where you can show how well your trading capital performed. Make sure to add some form of benchmark, maybe some stock index and the bitcoin price. You could show like that that you did much better than a vanilla investment. In case you want to start slower and don't take in foreign money, you could ask your friends and family that are looking for better returns. Right now with the high inflation and still very low interest rates on bank accounts it makes a lot of sense to invest in cryptos. Just be careful that you don't make too big promises as it could lead to unhappy investors.