Personally I have experience first hand how impatient can make you lose big time in this space. I had the opportunity to finally make it big but my lack of patience denied me the opportunity. The feeling sucks no doubt when you look back at what would have been.
Experience is the best teacher, this days, I tried to hodl certain projects I see potentials in them, dump the ones with no prospect and most of all I tried to build my portfolio with potential coins.
It is also important to have a backup funds for stormy market like what we are currently experiencing. Situations like this in most cases are blessing in disguise when the market fully recovered.
At this time the market is prone to volatility, in such a time it is better to do DCA or for those who do short-term trading it is the best opportunity to buy coins and sell back to get a good profit but the market is running fast and I don't think it is better to hold now because the market may fall further so it is better to either do DCA or short-term trading.
Building a portfolio with the best coins is a good strategy but for long-term trading or long-term holding, I trust BTC the most and I am not in favour of holding altcoins for a long time. Yes, because of the way the market is going right now if the market goes down, alternative coins will go down a lot.
So if you are buying alternative coins then my suggestion is to do DCA if you are holding, if you are doing short-term trading then this is a good opportunity for you to buy and sell when it goes up a little and secure some profits.