It's a great Feeling to hold an bitcoins it was a wise decision to invest in a bitcoin and this is just an beginning
Still the best days to come at present i am investing everything in bitcoins because the scenario would be different in next 5 years and i ll be a rich guy for sure.
For sure you should hold the bitcoin you have or trade as it would not be profitable to sell now unless you are an early adopter, miner, or profit from something. Most don't fall under these category's though they are guys that have brought in over $400.
You should be careful investing everything in bitcoins as you won't be the first who have done that and their everything at $500-1000 is not looking great is it!? Same as yours might not when it halfs in value again. Invest what you can afford to lose and you won't go wrong.
It's not profitable for most miners either.
If you want to read a horror story on the dangers of attempting to trade significant amounts of BTC with zero experience, I would recommend reading this: