Should I stick with my MacBook Pro or grab a new one?

A couple days ago I was adjusting the angle of my mid 2010 13“ MBP and the screen cracked along mostly the lower left side of the screen with only two long hairline cracks on the left most part of the screen. The rest is on the black "bezel" part of the screen. The cracks don't bother me that much, as of now, but my OCD might kick in later on in time.

My question is should I keep this MacBook, up the ram(my comport lags even when having 6+ YouTube tabs open let alone editing videos), and get a bigger hard drive; or should I wait it out for the next MBP refresh and pick up the fastest(I assume 2.9ish ghz) 13" MBP?