I'm holding the coin what I have invested long ago. I will touch that wallet when my mind get satisfaction with the bitcoin price rate. Actually I will hold it until bitcoin reach new ATH and make historical movement. For regular trading or buy sell I use other funds and wallet. Different people have various thought. So you will see all type of opinion here. Finally the decision upto you.

You sell if you have gained profit and it's why we hold investments like bitcoin. The goal for aiming bigger profit depends on your goal. You can eventually buy at cheaper price of bitcoin if you have to sell it. This is one of the good things in buying, holding or spending bitcoin.
You get to have the profit and if you want to take it again, you can always buy depending on the market's price and the season. If it's bearish season, the favor is in you and you can get back your sold bitcoins at cheaper price or at least lower than the selling price.

When you traded your Bitcoin that means you had already spent the chance of having this so that is categorically Spending.

While in my part i Literally spent some When i needed a Cash to pay for some bills that cannot be done using Bitcoin.
But i'll Keep my Holdings as long as a can since it is clear that market is now on the move to go straight up in the sooner days.

If you have a feeling that you will not survive this pandemic or if you have weak immunity, I would spend all the bitcoins on alcohol, drugs and women to leave this world with pleasant memories!  Just a joke...
I would not spend bitcoin without needing it! This currency has a great future!

There is no correct answer because it all depends on what we can do, if we are good in trading then why we should hold because a good trader can easily increase the amount of btc that they have in trading but if you have characteristics of a long term investor then it is better to do HODL than trading. When the pandemic starts, most of the financial market crashed and cryptocurrency market is belong to it, it created fear but it managed to hold and recover. Now, the bitcoin is now in uptrend and it became trending after it broke out the recent resistance at $12,000. In this kind of situation, the thing is it is better to hold and many traders calling it as trend follower and you will just sold it after it breakdown in a support or it give weakness in short term time frame. I have bitcoins that I hold and I also have bitcoin for trading but my portfolio in HODL is more expensive than the portfolio that I have in my day trading port.   

Before the covid start, I have some small amount of bitcoin which is good just to earn a little profit, and I hold this coin for a long time because I don't need too much spending of bitcoin more likely for investment only bitcoin.
this is one of the best ideas for me because if you don't need to spend something with the use of bitcoin wait now and hold to get earning. Also staking one of the best ideas too if you want to save some money.
Also during this pandemic is hard to have a job or source of income, it's not the time for wasting money/bitcoin. Also, there is a lot humor that the bitcoin will surpass the previous ATH.

On the long run, given the peculiar characteristics of bitcoin (scarcity, censorship-resistance, network effect, adoption etc.) I was always convinced that it could have been valuable over time. It is a form of hard money that needs to be the last thing you spend.
By the way, do you know why central banks hold gold? Because it is a status, the more they have the more trust the get from markets. Unloading it would mean something is going bad: the same principle applies to bitcoin. I have a very tiny amount available for spending and every time I use it, I replenish it (buying more).

I think for most people the choice of holding or selling bitcoin depends on the price at which one bought his bitcoin. therefore, If you really want to be liquid and bought at a lower price and have no other alternative I would advise you to sell. But If you have other sources of income, bought at a higher price and you do not directly depend on your Bitcoin profits, then hold.

Definitely HODL until the coin becomes widespread enough that spending is possible with ease