How do you guys determine value?

Hey guys, stock guy here. I'm looking to get into crypto and I'm wondering where you guys start? I noticed people have stated they have price targets but I have no clue how they can ever forecast that, as it's not a company with predictable cash flows you can model. Especially Bitcoin where the technology has stayed and will stay relatively the same forever. So how do you guys determine if it's a good buy? To me it seems like a purely speculative play, buying just hoping it becomes a mass adopted currency.

Please enlighten me :)