Or, diversify, take 50% (or some other %)
And buy in to the top ten Cryptocurrencies by Market Cap.
Periodically keep an eye on the top 10 Cryptos by market cap, to make sure you're still invested in the top ten.
Secure in cold storage, and Hold.
Actually not a bad idea.
Trouble is, when you look at the spike in Bitcoin, it affects the value of the other coins as they are all priced in Bitcoin. So while the dollar value goes up, the bitcoin value of the top 10 goes down.