Investors who invest for the long term do not wait for the market to fall below its high of $2000 or for the market to change. By long term investment plan we mean long term plan with a particular coin. If you plan on a coin for two to three years, then you never give too much importance to the fact that the price of Bitcoin will change. For those who trade it is different but there is a substantial difference between trading and long term investing 2.
A trader's objective is to buy a coin at a low price and sell it at a high price, but for a long-term investor, the plan is not so simple. When it comes to long-term planning, investors think that they should invest in the right coin and hold that investment for a long period of time. I believe so much that those who were waiting to invest for the long term have already invested for the long term.
I understand what you mean but long term investors too buy coins when the price is low and hodle it for their long term goal investment. They too don't buy coins when the price is very high because they know that they would not make too much profit from it so they buy enough when price is on the bearish. Trading are buying like that because they are looking for instant profit and not even two days or weeks. And for this days, traders use Litecoin and Ethereum more and it is giving them good profits. Trading is just a calculation and when calculate to the rightful direct then you will definitely make your profit.
Bitcoin trading this days is some how difficult because of the withdrawal challenges of the tx. So many use alternatively.