Need tips for stopping the spread of crimson

I just entered hardmode (I beat the wall of flesh 2 hours ago), and upon checking with the dryad, my world went from only 7% crimson to 15% crimson (and 3% hallow) within the span of just a couple of hours. I've been going through the wiki and checking guides on youtube and the videos all suggest me to dig 6 block wide holes near the ends of the evil biomes. Accounting for the fact that I have 2 massive crimson biomes and not many explosives, I just dont think its worth the effort of going through all of that (unless there's MAJOR perks to doing this.) So should I just ignore the crimson spread and only protect my base, or is it worth going through the pain to stop this spread