I have a suggestion,there is 5 levels of how big your stake is right. Well why not take it further to encourage power ups and make each step feel not so huge like dolphin to orca, orca to whale etc.
each fish could have 3 levels or so like splinterlands and other games, like gold 1, 2, 3.
So orca is 50k, you could have 3 levels,50k,200k,350k,to feel like more of an achievement and make each jump feel less huge.
just an idea.
I did a post when I powered up to 30k back on Steem with some alternative suggestions for the ranks based on stake - not sure these would take off but I do like the smaller gaps between each and having more badges? Count me in!
Here's some suggestions from that post with slight modification to what I put in the original post from what you said which might be cool (although I think things are based on vests rather than HP exactly so these are ball park figures):
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then, we probably will have numbers like 5-10-20 participants a month? and it would be zero for whales... for years :P too frustrating experience, imo...