Definitely keep it. Flat screen digital monitors are great for workbench, but they're not so good for games. The problem is that the display is *too* good! Far too crisp and clean. CRTs have a more forgiving display for old games.
Totally, I find Amiga games are next to unplayable on an LCD. I tried several different LCDs before I dug my old CRT out again, you can see a comparison with a Samsung LCD and my Philips CM8833-II here:
https://youtu.be/v3SZkjF1RDI?t=5m24sSkip to 5:24 for the comparison.