This would mean you are a senior member, not a legendary member then? This would otherwise leave only 5 users with legendary rank, assuming mythical, padawan and jedi would have even high karma requirements. As a reminder this forum isn't btt, nor that similar, so these karma requirements would not be appropriate for here. This is why I suggested a very light karma requirement, as opposed to anything remotely similar to btt.
As people were teleported, ranks were also teleported.
Technically not, activity was teleported (capped at 1,200), not ranks. Those with 5,000+ activity on bitcointalk were not given Mythical rank here. Nor was merit translated into karma. The complexity would be imposing such a karma limit but excluding Teleported members (as it seems you're suggesting). Some of which don't have the required merit on bitcointalk anyway, so wouldn't deserve exclusion,.
I am talking about new users . 5 karma is basically nothing, I think making harder to rank up is challenging and could even stimulate people to contribute
Tbf it sounds like your're not talking about new users specifically, but otherwise non-teleported? Otherwise given the lack of karma distributed on the forum compared to merit (the ratio is probably 10:1 per member roughly), then something slightly higher than I proposed might make sense, or a tenth of what you proposed (as Lucius proposed) for example:
Senior: 25
Hero:50
Legendary: 100
But then admin isn't going to check every teleported member to see if they got the merit on bitcointalk to be eligible for such ranks, so would have to include everyone here.