Actually time is not a problem for an investor even though they have to wait in the next few years to wait for a bull market to occur and be able to take big profits from investing in altcoins and Bitcoin, of course.
In conditions like this we can take advantage of it by taking Bitcoin and altcoins which have the potential to experience a significant increase in price when the Bitcoin HALVING occurs in the next few years.
This will definitely happen and can be seen from the market history in the past few years.
If they are a long-term investor, yes but for a short-term investor, they can't afford to wait that long but they will only sell after a couple of months. For them, time is important more than the extra profit but I think they still can be able to earn more before those long-term investors sell their coins and make a profit, as long as they will buy back again right after they sell or they can wait first for the price to drop a little.
The halving is for BTC so BTC is the one that is expected to rise. It's important to max out this coin first before anything else. Maybe after the halving, that is the time that we can properly divide our funds to some other cryptos.