Bitcoin is money, if its value goes up, you are making money. You can't buy 2 pizzas for 10,000 bitcoins anymore, in fact you can buy 4.5 times more pizzas than a few months ago. It may look like you're not making money before you sold, because it's hard to spend Bitcoin, as places that accept it are still very rare, but if you look hard enough and are lucky, there are opportunities to pay with BTC directly.

No, I do not want to hold forever because I need to sell my bitcoin and other coins to make money that I can use to buy my daily needs or the other things with fiat. But if your country accepts bitcoin as the payment system, you do not need to convert your bitcoin to fiat, and you can get directly to buy whatever you want with your bitcoin. In my understanding, as long as we sell and make a profit, that means we made money, even if you are not yet to sell your bitcoin or the other coins.

If Bitcoin does achieve global adoption and merchants start accepting it as a regular means of payment, then you will not have to sell inorder to 'take profit', you simply use it to purchase what you wish.
   
If you're talking in purely speculative terms and the relative value of Bitcoin to Fiat, then I'll say NO, same way you cannot lose until you sell. Bitcoin is highly volatile, if I'm up 3× from when I purchased $100 worth of BTC, I cannot say I own $300 as the price can dip at anytime. However, I can always say I own xx amount of Bitcoin.

I believe that most people who own Bitcoin have their own exit price - there are few who think that it is not necessary to change BTC to fiat at all. Regardless of the fact that BTC is actually a currency that can be used to buy and pay for a lot of things and services - how many people have actually practiced this method of payment? People still feel a lot more comfortable when paying with fiat, and now they have another good reason not to pay with BTC, and that is relatively high fees.

I find it stupid to hold forever, and at the same time be in a bad financial situation which some people still do - and some will probably find themselves in such a situation that they will take their BTC with them to the grave. Spend as much as you need, and when you have the opportunity to invest again then do it - in the long run it seems like a good strategy.

NO.  This is something that I am constantly talking to my clients about.  You don't actually realize a profit or loss until you actually sell the underlying security/financial product etc.  I often have client's tell me "well in 2008 during the Great Recession I lost $xxxx amount of dollars".  My response is always.. "Did you pull out of your stock investments and move everything to a fixed account, or did you keep things where they were?"  If they say they left things as is, then I tell them they hadn't lost anything as the value grew back. 

I think it's actually trickier than that, and not only related to Bitcoin. If a person keeps hodling and hodling, and never spends the BTC this person once bought, I'd say it doesn't matter what the numbers in the wallet show. To actually benefit from having BTC, one has to either sell it for fiat and exchange fiat fro goods/services or use BTC directly for goods/services. In any case, using it eventually is crucial, because until you do that, it doesn't really matter whether you have 0.1 BTC, 10 BTC or no BTC at all. People tend to live their lives hodling without ever benefiting from the wealth they had.

You've only managed to gain profit if you have receive the money you once invested with additional value, so yes, you haven't made any profit if you only hold onto your coins as long as you want. You must sell it to made your profit.
Just like what is happening in the sneakers community, if you bought a Jordan 1 at retail for 100$ and the current price for it is now 500-1000$ then you can't say that you already profited if you haven't sold it yet. You only lost 100$.

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I think the correct term for this is "Potential Profit" as you can sell your assets anytime soon and earn a profit from it.

I can't say the price that I'll be fully selling all that I've got or maybe not. In order for us to profit, we have to sell, and holding forever might let you lose the opportunity to make money. The important decision you need to make is to sell whenever you're in profit.

You sell if you're happy with the profits.

You hold if you want to hold longer and you want to avoid the current situation of the market and you're not liking it. Don't forget that if it's necessary to cut loss, then cut loss.

Profits wont be realized until you do sell off those coins which means you do really earn or in profits but those are still on the limbo side because you havent converted it yet
but you can do those things later on if you wanted  to but be sure that you would really be  fast on doing that so that profits wont really be declining.HODL for some people
but others do really  love to buy and sell to materialized everything so its a matter of preference on what are the things you do like into your investment.
Making money is what we do aim for so decisions will vary on person to person.

It’s not just a matter of price. Talking about this subject on my local board, one of the terms we came up with is that of a "regulation hodler". That is, some people may be willing to sell, but the current regulation in their country is unclear, and they refrain from selling at this stage.
 
People may have started gathering satoshis without too much of an intent, but the rise in price could make their cumulative start to become a pretty stash. The problem arises when what started off as a sort of hobby, and has been so for some years, becomes something non trivial to justify in the eyes of the IRS (or equivalent). Add to that a regulation that is evolving and we’ve got a generation of "regulation hodlers", waiting for the waters to settle before they can even ponder making their sell.