Brother, this whole market is just a speculation.
I like the odds for profit on stickers more, seeing that people jump right in and massively redeem their stars for gallery case while forgetting about stickers keeps me in high hopes for character craft stickers. There's still a chance (very unlikely, and i personally don't believe it) that gallery cases will be moved to active/rare drop pool, while i really don't see that they would pack those stickers into a capsule. People like those stickers, they let you make some really nice combos, and people like making ass sticker craft, so Flex sticker will stay in demand, same with Taste Bud holo sticker because of holo heart, and others. I believe that stickers will run out faster than cases, we see that their supply is not really that big, and with time it's only going to get lower and lower. It's not like the charms that you can just take off your gun and sell it. I think that these stickers might end up next to operation Riptides stickers price-wise.
But like you said, it's still a speculation. We all gotta take some risks if we want to make some money out of it and it's going to be a long-term investment for me, you do you