Solana will definitely survive the big collapses, it has a very large ecosystem. I don't quite understand what you're talking about, considering how well Solana has traded the last 4 weeks. Solana historically has a bullish chart, historically this coin is always rising. In the last 2 years the project has grown by $20,000, it rightfully takes its place in the top 10.
Unlike NANO with which you made the parallel, SOL has another way. NANO was a project that grew on the 2017 HYIP and never updated ATH again, this is a completely different asset class, which is very risky to invest in the long term, unlike Solana.
How are you so sure about this? Nobody in the world has a data to back this up, you could be right, you could be wrong but we can't know it right now. Nano was the most loved "new" coin during that period, it was basically hyped beyond measure, but it dropped to never recover again. We could possibly see SOL to do the same again, never be above 200 dollars ever again, there is no guarantee for that not to happen. Also it is a coin that is under 200 bucks, no idea what you mean by growing 20k+ in the last 2 years. All in all, yours is a prediction, you think its doing fine and that means it should do fine, and mine is also a prediction, I think its doing good, but that is not a guarantee that just because it has been good, it should continue to be good and thats the risk I am trying to get attention towards. Like I said, I am not saying it will go down or stay down, all I am saying is that, thats a "possibility".
And how do you imagine long-term investing in general? If you invest in a coin, you can't be guided by the fact that no one knows whether there will be growth or not, you just believe based on your own analysis. Otherwise, what is the point of investing at all if you are not sure for yourself personally that this coin will have growth. I've done my own research and made my own decision, I'm not imposing it on anyone. As they say, DYOR.
The early bitcoin investors couldn't be sure bitcoin would grow to these values either, but they still invested and believed and waited patiently. They had their own internal motives for such behavior.
And if any investment is approached the way you describe, then it doesn't make sense for anyone to hold coins at all in the long run. However, they do.