It's possible, but IIRC we've been down this road last season with Slayton after a big game. He was a hot waiver claim, but production was wildly inconsistent. Week 4 last year he had a monster MNF game (on my bench) where he blew up with 8/154/2 against the Eagles.
He then put up a lot of mediocre games, like 4/67, 1/4, 6/44, then week 7 at the Jets he blew up again with 10 catches on 15 targets for 151 & 2 TDs (in my lineup as an emergency injury replacement

) but the rest of the season was super mediocre - he did have one more 2 TD game, which were his only 2 catches, but most weeks he wasn't playable.
I'm not saying this year can't be different, but I would take a deep breath before spending all your FAAB on him - he has teased us with big performance spikes, but consistency was a problem.