No research. How often have you heard of a new trader who bought a coin without doing research on the fundamentals and background of the new coin? Research first so
you don't regret it later.
Before buying, always make sure you have a plan when to buy and sell your coin especially at a loss. Don't let emotions dictate your actions.
Part of a trading strat is how much you're going to put in a single trade. What matters is that you keep gaining over time with losses instead of betting everything
on a single trade. There's always the next trade.
The most successful traders strictly follow a trading plan. Be sure to make a trading plan that works with you before even thinking about buying a coin.
There's at least one broker that gets hacked every year. Some even declared they're hacked to get away with all the coins they have. Be sure to find a broker you can trust. Remember #NotYourKeysNotYourCrypto.