I have no way of agreeing with your plan because humans are basically never satisfied with what they have. Bitcoin is money, you can never give up on the amount you have without trying to accumulate it again as long as you are confident and have the budget to do so. 0.5 btc is not much, but it might be a lot for your current financial capabilities.
The time will come for you to have a bigger investment portfolio if you can do it consistently. Investments don't need to be forced and you have to be wise enough to set the direction of your income and expenses, so save as much as you can. Also some plans have gone haywire for some reason even unexpectedly. Do you remember when covid happened, many of us or investors had to sell a certain amount of bitcoins because they lost their source of income because of the lockdown.
Yep.. we have to be careful NOT to have to be forced to sell any (or all) of our bitcoin at a time that is not completely of our own choosing, and for sure the March 2020 scenario did force a lot of weak hands into selling BTC and perhaps even selling more than they would have had preferred to have sold - because it is may well be possible that they well never get those BTC back. That is one of the examples to have reserves and maybe even excessive reserves.. and if bitcoin is serving as your reserve, then you may well be over-allocated to bitcoin.. in a kind of way that does not make a lot of sense... but you do not know until the situation comes and then you end up panicking... and those kinds of situations are not easy, even for highly convicted bitcoiners to either HODL or to buy more or if they have to sell.. to sell as little as possible... and each person will have to be responsible for the level of extreme dire that s/he had put himself into by those kinds of outrageous and extreme scenarios that sometimes end up playing out in the real world rather than the world that had been imagined the the delusional investor who invested too much.
There are precarious situations that always need to be considered even though we have developed the best plan for long term investment. I'm sure anyone would consider selling their bitcoin as long as they believe it's the best option for survival or the only option that will help them out of a disaster. Drying up sources of income will force a lot of people to sell their properties including digital assets like this, and actually that's not a problem at all because we don't have to hold bitcoins forever.
The Covid disaster has taught us something, especially about how we have to manage investment plans and adjust things well. I believe bitcoin is a reserve for some people instead of gold or other investment assets, but I think they also need to diversify their assets to other assets instead of just bitcoin. No one knows when we will have financial problems that will force us to sell, it could be when the price drops a lot or it may be lower than what we expected. Having other assets as options is good, so I think it can never go wrong.