@Alex S. The stock market was my first investing interest and I have dabbled in a variety of investment vehicles so I'm relatively asset class agnostic. In your case the first thing I would look at is viability of the long term hold, if you cannot afford or are not comfortable with committing capital to this property every month, sell it and move on. Regarding the selling the property, in my opinion it doesn't matter where you bought it. Would you feel this way if you bought the condo for $100k. We're not psychologically wired this way, but financially it only matters where the market is going and not where its been.
Every decision we make without 100% certainty is a bet. Are you willing to bet that return on the capital you have in this property will outperform other investments (RE in CA, RE out of state, stocks, bonds, bitcoin, sports cards)? If so, stick it out. If not, again, sell and move on.
For context, I like Southern California real estate long term, but I don't like the SF Bay Area and I wouldn't buy a condo in most places.