The main key on here is that you should really be that investing on the amount on which you can afford to lose on which this has been always the main principle on the moment that you will be making an investment on which proper planning and risks management.
when you're talking about proper planning and risk management, it's not to suggest that you're investing with an amount you're able to loose but deals with being calculative enough to make provision for a portion that's going to allow you continue holding your asset without getting tempted to sell half way. The phrase
what you can afford to loose is a gambling phrase that is mostly used to tell gamblers not to go too extreme with the amount they use in gambling. For Bitcoin, for as much as we know, we've not seen it as an asset that can ever go to zero as much as we have seen it grow and so it's somehow improper to use such phrase in this kind of scenario.
I consider the idea/suggestion of investing no more than you can afford to lose to also apply to investing.. not just trading and/or gambling and maybe it applies more with volatile assets like bitcoin, even though the reality is that there is no sure investment - even though some investments are more volatile and/or risky than others.
And, sure are characterizing bitcoin as something that is more of a stable investment - and surely that seems to increasingly be the situation with bitcoin, even though there continues to be risk with bitcoin, including but not limited to the risk of it going to zero.
even though surely it likely feels better to have your bitcoin investment to be in profits rather than not.. .. but there also needs to be some consideration that being in profits should not be something that is presumed as if if were guaranteed (by the way @Marvelockg, I am not presuming that you are engaging in any presumptions that bitcoin is guaranteed).
yeah, I know that while it's at the core of every bitcoins holders mind to be in profit, we can't factor out certain momentary downtime that may occure or presume that profit are 💯 guaranteed. Realistically, Bitcoin hasn't stayed that long, at least from the moment it really gota reasonable value to become too certain of it's worth in the next 20 to 50 years time but based on past record and it current level of adoption and prospect, it's the bases for speculating to be in profit if one continues HODLing his Bitcoin.
Sure, we are likely going to be in profits if we hold and continue to buy bitcoin, but it could still take 2-3 years or even longer to really get our bitcoin holdings into such a place, and there might even be some guys that might take either more than a whole cycle to get into profits and even otherwise to get some decent bitcoin holdings, and sometimes based on their own cashflow situation, they might actually have to buy more bitcoin at higher prices rather than lower prices if they had been able to buy more bitcoin earlier. So their average price per BTC might be higher than other folks, but the main thing would be that they continue to accumulate BTC without being so worried about their average price per BTC (even though they also keep track of their average price per BTC, too).