Worth selling an old active fund (and paying capital gains), or hold indefinitely?

Hi all. I mostly invest in VT now, but there was a time I invested in a few active mutual funds that I still own. One in particular, FOCPX has done super well recently since it is tech-heavy, and I'd love to "sell it high" now and reinvest it into VT.
But if I understand correctly, I'll have to pay capital gains taxes, which reduces the overall investment value, and causes a "hit" to future growth. I would have to believe that this fund will significantly underperform VT going forward to be willing to take a tax hit now on selling it now.
Is that logic right?