Personally, I don't have any problem with the idea of ongoingly looking at the BTC price and the value of your overall BTC holdings as compared to fiat,
Inasmuch as I understand the good feeling of realizing that one is in net profit in his portfolio when compared to the fiat injected, there is no doubt that it is really a form of distraction/temptation for those with long term perspective. Some cases, when the profit is like lets say x3, there is thought of breaking even that normally creep in and if not properly managed, there is a chance one might sell some of his holding unplanned and sometimes when one should rather be buying. So, to avoid a situation like this, it could e best one avoid looking at the price regularly... it can be twice or thrice per year or when there is a major event like ETF approval or so... then checking the market response is not out of place.
In 2015, there were even several times in which I looked at my BTC holdings, and I would see that my average cost per BTC would have been something like $580; however, if the BTC price was then in the mid $200s or even lower, I would consider that whatever amount of bitcoin that I bought would be less than half the price of the average cost of my overall BTC holdings, and I would consider that each purchase that I made would bring down my average cost per BTC.. and it took almost the whole of 2015 to bring my average cost per BTC down from $580 and down to around $500 per BTC.. and so then by the end of October / beginning of November 2015, when the BTC price went shooting up from $300-ish to $500-ish, I almost started to panic (well I did end up panic buying at around $500 - so embarrassing) because the BTC price was going to end up being higher than my average cost per BTC, so there was a kind of good feeling that came from buying BTC and bringing down my average cost per BTC with each BTC purchase.
This is somehow similar to what happened to me. The only difference being that my passion is just to own Bitcoin irrespective of the price. In other words, price do not really matter to me because I just want to own Bitcoin. To be frank, it will take a great deal of experience to resist the urge of looking at the price always. For someone who is relatively new to buying Bitcoin, there are high chances they might be frequently checking the price, calculating total investment and net investment to check which is higher. I think this is normal as only experience can remedy this. The journey of accumulating Bitcoin is truly a marathon and not a spring. It entail a lot of wonderful processes of growth and maturity.