It's totally personal preference but I ended up getting one and don't regret it. Spent some time looking at different options and settled on an Ursus because the price was reasonable. Found
https://phreesite.com/cheapest-csgo-ursus-knife/ which showed me what's available without breaking the bank. Seeing it in game every round is pretty satisfying honestly. If you have the budget and you play regularly then why not. Just don't expect it to make you play better lol