This often happens when cool and profitable stocks go on sale. Unfortunately, you can't buy them because you have already spent all the money on the rest of the shares. I also was in such situations, so I am used to contacting my personal
financial advisor, who tells me what to do in this situation. Usually, my adviser and I analyze and compare stocks that have already been purchased and are in my investment portfolio and stocks that have just been released and may also be profitable. If the analysis is successful and we find out that the new stocks will be more profitable, we sell the old shares and use this money to buy new ones. It doesn't seem to be a very complicated tactic, but you need a good analysis to do the right steps.