I don't know if I will actually be successful one day if I invest in Bitcoin. I continued to invest in Bitcoin for many years but did not get any good results then everything was in vain. If we can invest correctly then we can make a profit then we should invest in Bitcoin and hold Bitcoin.
Were you accumulating bitcoin and holding or were you merely buying and selling with little profits, more like gambling with it? Perhaps if you were holding the bitcoin you claimed you were investing into and not trading it, you would be financially better off by now. I take it that you were among those who made mistakes by taking quick profits when you should be stacking your bitcoin for a long term ride which explains why you were unsuccessful after many years. You can still start afresh your journey with good investment practices and a long term holding plan, you can still have a chance at some level of success in the future. Bitcoin is meant to be held for a long period (4 - 10 years or more) to be profitable and the more you can hold without tampering your portfolio, the better your chance at enjoying compounded profits on your investment. Additionally, building out backup funds like emergency fund and other variances would help you keep your hand off your portfolio when in need. Be sure to accumulate it with your discretionary income so you can comfortably hold for long without fear or panic.
You can't hold Bitcoin for the long term and not be profitable, if you're not profitable that means that you're selling prematurely. Long term doesn't mean like 2 years, it needs to be atleast over 4 to 10 years or more, if you're able to hodl without selling you will surely be in profit. Bitcoin long term investment needs discipline, if you're not you can be enticed when price rallies to sell and take profit but if you understand that the longer you hodl the more profitable your Bitcoin will be you won't be in a hurry to offload it. So far you have a functional discretionary funds there's really no need to sell when Bitcoin pumps you should understand that it has the potentials to continue pumping on the long term.