Number one for me is always Solana, been an active Solana trader for a quite long time now.
Also I also following a new project HAHA with interest.
But don't sleep on Doge in the near future. It will go for a very good run.
Solana is a good and better coin that goes up and down. If one knows how to operate it well he can use it properly and benefit from it. I don't know so much about it, if it will work well in the future, we should work on it now so that it can benefit us. After Bitcoin, many coins have been established that will prove to be good in the long term. But I don't think they will succeed.
Good and better sounds the same, so you should only pick one but if I were to choose, I think you should go for the 'better' because it is more superior than 'good'. Good can only be used on a normal coin that doesn't suck that much but Solana is already on another level. It is an old coin that overcome a lot of challenges, which is why a lot of people trust it.
It is also normal for it to go up and down because it is not a stable coin. In fact majority of the cryptos are like that. It is called as volatility in other word. Operating or using a crypto is not hard but it is only the same as how we use our money.
Obviously, we will use it for buying (mostly online) because they are digital but there are also a lot of people who treat their cryptos like an asset, so they only HODL it like any other investment asset out there. Another example of asset use would be is when they use it as a medium to perform a trade in a crypto exchange site. No one knows the future, so don't worry if you don't know the future of this coin. As of now, the coin is still doing well and we must feel it if it is going sideways, to the point that it is seems not recovering anymore but before it totally collapses, we can still be able to get out.