<prompt> Human: Is it a balance? Does it depend on specific tax situations, if so, which?  <response>: Instead of focusing on what you paid for them, focus on what you would pay for them today. If you have 5000 in stock and are trying to decide whether or not to sell it ask yourself if youd buy that stock if you had 5000 to invest right now. If you would, then dont sell that one. If you wouldnt, then that one is a good candidate to sell.The one caveat is that I avoid taking gains on anything in a taxable account that Ive held for less than a year to avoid short-term capital gains. 