My opinion, Bitcoin all time saving mode is the best way. Some time when bitcoin price up then sell and when price down then buy is the best decision. This method all time not working for trade. Many time i noticed when i sell bitcoin or altcoin sell since then price grow up and up. And when I buy bitcoin or altcoin then price low day by day. specialy, altcoin hold, sell and trade big loss. 4 years ago few coins i hold for future. now this coin price few value or most of coin value is zero. Few coin trade, there too big loss. past year in the case of 1 coin invest $1000, this coin price today zero.
Now
*Hold
*Sell
*Trade
Looking forward to the opinion of the experienced.
You just need to know this, bitcoin is good for long term investment, the longer you hold, the bigger the profit will be. Altcoins are short term, meaning if you are already profitable, then you should take profits and never think it will grow further in the long time, altcoins are just pumped and dumped, nothing more and nothing less.
If you are skilled, then do your own analysis, you can trade with any coin as long as you see it as potentially profitable. If you are unskilled, stay away from trading as it is not as simple as buy and hold.