If they can decide not to sell their Bitcoin and use only their discretionary income to buy their phone for important matters then its fine, but if they don't have any choice and only have their Bitcoins. Maybe he don't have a choice but to sell it,
I believe having a phone is part of basic needs because if you are a business person or let's just say someone who's working you need it for your business, even though you are not doing any job yet you still need it because we now live in the the digital era whereby technology is needed. So what I'm trying to say here is that all bills much be settled before investment which means if you don't have enough spare money to buy Bitcoin after all bills has been sorted out then it's fine that way, but if in the future you have sorted out your necessary bills and other important expenses and you still have some leftovers money (discretionary income) then you can continue accumulating more Bitcoin. Most importantly, before investment one should have an emergency funds so that if any emergency situation occurs they can use from their to sort them out, let's just use the phone you talked about as an example. If while accumulating Bitcoin your smart phone got lost or stolen, you can take some money from your emergency funds to buy a new smart phone because you need it.
If in the future you also want to sell your Bitcoin after making some profits, you don't need to sell all of them just a little figure will be okay, starting to accumulate Bitcoin all over again won't be easy but if you had some Bitcoin remaining you can easily continue accumulating from there. Even in the future Bitcoin will continue to rise, now let's just imagine you sold all your Bitcoin and suddenly Bitcoin skyrocket to a more higher price, there's no way that you won't regret. You might feel emotional and start regretting (which you had know you would have hold more longer or kept some Bitcoin). From my own perspectives I believe those who sold all their Bitcoin are already missing more better opportunities right now.
As an investor, you need to have a plan and a strategy, you don't just get into Bitcoin without have basic knowledge or let's just say common sense which probably includes a strategy, with all this I'm very much sure that thing will be a lot more easier as you get started.
Selling of Bitcoin to buy phone is not a good idea, phone has already become part of basic needs in daily life so buying of phone should be budgeted or planned for so that buying it will not mean tampering your Bitcoin asset.
I guess you misunderstood what I said above, but it's fine let me quote the part below so you don't have to start alover.
I believe having a phone is part of basic needs because if you are a business person or let's just say someone who's working you need it for your business, even though you are not doing any job yet you still need it because we now live in the the digital era whereby technology is needed.
So what I mean there is that, yes you don't need to sell your Bitcoin before you buy a new phone if you need to, but phone is part of our basic needs and you must also include on your bills if necessary. If after sorting out your bills and you have no leftover money you don't need to part because you didn't buy the unnecessary things. I believe I have already talked about why it's necessary for us to have a smartphone if you don't have it, number reason is that we all are in the digital era whereby technology is needed and there are jobs online and other important opportunities too, and even though you are doing a domestic business you also need a smartphone for for your local and international businesses.
As for me if I have $200 and I don't have a smartphone and I also want to buy Bitcoin, I will buy the phone first before I start buying Bitcoin, because bif I buy Bitcoin before the phone I don't know but I'm certain that I might sell the Bitcoin to buy the phone if it gets to some point.
So what I'm trying to say here is that all basic needs must be settled before Bitcoin accumulation starts.
Now do you agree with me that a no coiner must have a smartphone before they start investing into Bitcoin?
Yes they need it because without it they can't buy Bitcoin, smart phone is necessary. And they also need it to get more informations about the market in the future. Even though they don't necessarily need the those information, but at least the exchange they normally use for buying Bitcoin will sometimes update them about the market.
Another advantage of having a smartphone before investing into Bitcoin is that without it you might not be able to increase your wallet security (yes that's right). With your smartphone you can increase your wallet security by activation 2FA authenticator or all lock on your wallet.