The answer primarily depends on your goal as an investor whether for short or long term. Each option has its own implications and effects and you might want to consider it first before making a decision. Here are some of the pros and cons of having to hold it for short/long term:

Short-term investments - Generally, new investors tend to invest their bitcoins in a short term basis since they want to realize profits faster. As compared to long-term investments, it is much safer due to the fact that it requires less time but also expect to have low profits at the end of the day. Though one might argue that bitcoin prices may suddenly skyrocket, you still have the choice on whether to withdraw it or not.

Long-term investments - This type of investment requires time and dedication as you are saving it for future use. People who generally invest bitcoin for long-term tend to realize huge amounts of profits since they take advantage of the time by maturing their coins. The only risk that you might want to consider is the dropping of bitcoin prices as it may happen without sudden notice.

Be reminded that investing your bitcoins is a high-risk, high-reward system. The value of your investment primarily lies on the price of bitcoin and there is no guarantee that you may collect profit. But by just looking at the price history index, one might observe that there has been a steady increase on the price of bitcoins over the past years. So I really do suggest that you invest right now and hope for the best.

PS: Only invest money that you are willing to lose.