re: 4m buy well ... I did it the other way around ... bought...

re: 4m buy well ... I did it the other way around ... bought oppies at 1.7/1.8 and sold FPOs at 4.2 and 4.4 a few days later. Gave me somewhat double the leverage and money in the bank. Why is it a good idea to have less leverage when all is good except for tax loss selling should that person have bought at a higher price, and then make less profit obviously if it goes up? I somewhat don't get it. Can you please explain this one slowly for me?