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It really depends your timeframe. If it is for a very long term, just keep it. If you want sell it soon and perhaps buy one back cheaper later, I think that between 5500 and 6000$ is a good price. The correction that we will have after the new high should bring us back in the 3000-4000$.

To be honest, I forgot about the whole thing until a colleague told me how much they've risen the past year. I only invested about $300. I guess it wouldn't hurt to sell a bit at that stage and keep the rest for later. Thanks.

If you have time to sit on the computer the whole day than I would recommend you to do day trading. I usually sell after it breaks the 24 hours high and put the buy order little higher than the average price, so that way I make few hundreds everytime. It's very normal for crypto like BTC to go up and down by 50-100 every 30 minutes. You can take advantage if you are on the computer all day long.