This mostly applied to investing, a trader isn't supposed to hodl unless you're trading for a very long time. Trading naturally should do with you taking advantage of the price difference in the market and that means you can buy and sell your coins as many times as possible even with in the interval of a day. As a trader your major concern should be how you can profit from the market now and not in the future.
Future thinking are for holders and they shouldn't care about the current movement of the market as their strategy should always involved holding for the future. You can be both a trader and an investors as both are profitable when you understand what you're doing and doing it right.
Doing mistake in the process of trading is avoidable if the trader is careful about it. And also I agreed with the statement of irhact, anyone that is trading most not hold because the trader most buy and sell and if the trader must buy and sell then there is no need for him to hold. Trading can not be a long term because it is a daily business. The trader must trade to make profit every day.
It is only investment that can go for a long term because the investor would just dropped the fund there and can waited for a very long period and have his profit from the long investment.