For the true believers, Bitcoin will always have value as long as it exists.
Or do you mean bitcoin maximalist?
We will be happy to work or sell goods for 1 btc even if we know the price will move in the future.
Then that is not true believers is because it contradicts their principle that bitcoin's price will continue to grow.
The increase of true believers, of their revenue and of their networth drives the price up because as they get older, they get richer and as they get richer, they get more bitcoins. The process takes year and increases bitcoin's strengh and bottoms.
No need to generalized it. People have their own motives here, whether to get themselves enrich or used crypto as Store of Value (SoV), or currency, it doesn't makes any difference at all.
It's not a year or 2 bear market that will chase previous true believers and new true believers arrive in the community everyday and it's pushing the price higher.
As far as I understand, its the exact opposite. Those who came in late 2017 and early 2018 is already out of the market because they have lost so much money already. For who come in this community as just bounty whores and not true believers. And the price is still around $3700, still a far cry from the last all-time-high so there's not push from the believers that you're saying here.