you are not going to find a reason for Dash to regain ground against bitcoin.
The comparative advantages of speed, or privacy that made Dash an attractive coin, have been lost to BTC's coinjoin or lightning network.
What does Dash give me today that does not give me another coin?
I agree that Dash lost a lot and a year ago I was considering to disolve all my dashes. I didn't.
There is one good reason that keeps me in and that is the self doe able masternode staking reward which gives a significant 5.5% to 6% interest a year.
There aren't that many self managable assets you can set up yourself giveing you that.
ETH's reward is dropped below 6% now and with that one of what I see a significant source of dash drains gone. And the other alternatives like cardano and others are also below 6%.
ETH is a pain when you try to host a full node itself. In fact 2 years ago I gave up on ETH because I coudln't hold the blockchain anymore. The blockchain increase is beyond sane in in my opinion a killer. It's too much. The only option you hav eleft is to hold ETH on a thrid party.
And Bitcoin ... honestly lightning I never used. I read up on this in the past and I can only shake head on that this should be a solution.
Nevertheless Bitcoin undenyable made it and setablishe ditself even as a legal currency in a country now so there is no way around it but it is not usable as a payment in my opinion.
Dash is or would be.. but yeah it was not sold. Just saw a video today ..the rise and fall of htc.. guess what their "quality speaks for it self" or quietly brilliant didn't work. If you don't bring a solution into the minds of the people it will vanish.
It's a bit sad to see that somehow ppl think how much reward of a block goes to the masternode is relevant is significant for the price. That's not what gives something value or not. The useability and that it is present and used in ppls daily lifes is. There has to be a reason to use DASH.
If you can buy specifics things ppl want with dash only that for example is incentive to get dash and will rise the price.
As I pointed out the masternode interest is one such reason but it is a bit shadowed with worries if dash will keep it's price over long. Doesn't helps if you get interest on something when your asset loses value at the same time.
What I still love most about dash is that it's blockchain size is in a very healthy range and not bloated and is fast downloaded and processed through the network. You can still run full core nodes private easy and simple. In fact all my dash clients are full nodes. And transfers are easy fast and painless and do not need strange additional systems that do not fit the crypto mentality at all.