Aloha!
I have some advice for you: stick with btc for another year.
One of the best advice I ever got when I first started out was, "It's not about whether or not your coins increase in value, it's about whether you are gaining more btc."
This became true as I tried to cash out a couple months ago, as I converted all my coins to btc. Even though it seemed like I had gained profits, actually, I ended up with less btc than when I first started buying it. I did make some profit, but that was only because the value of btc itself had increased exponentially. I would have made more money if I had just kept it in btc.
Things are a little more different now, because eth has become almost as easy as btc to convert to fiat, but btc is still the core of the entire crypto market cap, and it still has a lot of room for growth.
Take a look at past bubble economies and speculative markets like the dot.com bubble in the 90s. That thing went into the trillions of dollars before it popped. Looking at it like that, despite what you think, the numbers say that crypto is still in its infancy and btc has incredible potential to rise in value.
I do believe that eventually, something will replace it, but definitely not this year.
Don't let fud or anxiety or ignorance guide your trading choices, bitcoin is not dead, it will be 25k by May, and 60k during the end of the year bull run.
everyday, as i monitored the movement of bitcoin value in the market ,sometimes i felt uneasy upon watching the descending value,the only thing that give strength on myself to keep hoping that it will fly to the moon again is the ability of btc to pump high enough in a short period of time, and besides , you are right ,that btc still the core of the entire crypto market , and that's legacy.