Why can’t you hold onto the doubling coins? Because you haven’t thought clearly about what kind of money you want to earn.
Doubling coins are not giving you no opportunities, but you haven’t thought clearly: do you want to earn "safe money" or "exciting money"?
Most people see a floating profit of +50%, and their hearts start to flutter, fearing a loss, so they cash out for safety. But when the coin continues to rise to +300%, they regret selling too early.
You’re not actually unable to earn double; rather, you want to make money while fearing losses, wanting to bet on the future while also wanting to secure profits. This confused mindset directly leads to repeated operations and disordered rhythm.
Experts are not more accurate; they are clearer about what kind of money they want to earn. If you just want to "safely earn a bit," then it’s fine to exit with small profits; but if you want to make a big bet in a bull market, you need to accept drawdowns in advance, tolerate fluctuations, set target prices, and once executed, don’t waver.
Money is not hard to earn; what’s difficult is to articulate clearly and settle your mind down.