The only reason it got so high is because it was being hyped up on every media website, on the radio, on TV, etc. That's how it works. Bitcoin/crypto is yesterdays news now. It's just going to keep going down because the mainstream aren't hyping it up anymore. It will never go back up to 15k, and I doubt it's going to go up at all, it's just going to continue it's steady decline.
Unless you can convince the mainstream media to hype it up again, there's no point in using it as an investment. Just use it as a payment method for anonymity, that's all it's useful for at the moment.