2018 proved that it was never a good idea to launch a project during the bear market if you've got no long term goals for what you're working on. I've seen projects die off easily from there and then lost track because they're not committed to what they're working on. But, I also saw a few projects that introduced themselves on that bear market and didn't stop from there and managed to reach the bull run and then, that was the time that they found success. By looking at the two situations, you can think of it and have an idea of whether you'll have what it takes to pursue the project or just stop.
Well, in fact, there are so many ICO projects that failed in 2018, whether they are still selling, those that are just running, or even those that have been on the market for a long time. However, at that time, all asset prices fell, and people tended to prefer holding their digital assets or adding to popular assets like bitcoin. However, if it's just introducing the project, and attracting potential users, it's still a good idea. IMO, in bad market conditions, and the prospective project to be developed can overcome this problem, then that can be a good signal to sell after a bear market occurs. however, selling in a bear market is still a bad idea.