Can’t hold onto it consistently? First, solve these three problems:

First, don’t be over-anxious. You can’t make the money at the absolute top; you can only make the money within your understanding. Always trying to sell at the highest point is like a primary school student stubbornly trying to solve a college-level problem!
Second, get the buying right before talking about holding. Is the sector in an uptrend? Is it a core one? If you’re buying something that’s just following the crowd, when it rises by two percentage points you’ll already panic.
Third, have a bottom line. To make most of the profits, you should proactively give in; don’t be greedy—when the final bite turns into a loss of three or five percentage points, also proactively cut losses. Don’t turn a small mistake into a deep drawdown.
Can’t hold it isn’t because you’re timid—it’s because you have no rules!
Buy the right core; then you’ll have confidence to hold. Set your bottom line, and leaving won’t be embarrassing.