Holdig your Bitcoin is best but instead, investing it in Altcoins for trading in short term basis is much better because you can gain more profits from Altcoins.
That's a risky, you can earn 500% after a year or more with altcoins if you bet in a solid one or you can grow slowly your bitcoins.
Isn't easy to predict the best strategy here, maybe spliting the money in 2 or more strategys can be the best option.
Well, that is the risk with altcoins and if you are going to invest in them then you will have to learn to live with that, holding only bitcoin is great for those that want lesser risk since its the strongest crypto, for those who want more profits then investing in altcoins is the way to go.