I see the idea of building up funds first before accumulating bitcoin as a plan that will delay our bitcoin accumulation journey. Instead of trying to build up funds before accumulating bitcoin, you can use the DCA strategy to accumulate bitcoin either weekly or monthly, whenever your money is readily available. There's no pressure to invest in bitcoin; no one is forcing you to do so. The only thing that can make you sell your bitcoin when it's not time for you to sell it is when you use your whole money to invest in bitcoin. You will depend on your bitcoin investment to survive because you used all your money to invest in bitcoin.
I think building up funds first is looking for away of having a stable income. Having a stable income it can enable one to invest atleast with the amount one can afford. If we look it in the other way saving money first to start up bitcoin investment, I don't see it to be building because even if one saves some money to start up investment and no steady source of income, if their should be a problem that money is needed to solve it, it is possible that one can sell out the bitcoin to settle the problem. But when one have a source of income , even if the person is investing with a little amount in bitcoin atleast with the steady source of income the basic problems can be solved without thinking of selling bitcoin.
Saving money to start bitcoin investment is not a solution of having a successful investment but having a steady source of income can sustain an investment. Savings without steady source of income to begin investment will be a difficult experience to keep investment going .
I totally agree to what you are saying, and I also want to add to what you have already said, saving to invest in Bitcoin is not the perfect idea too me because, when you save in fiat, it's very dangerous for the value of that money, because all money being saved up has an enemy, which is inflation, so if you start saving with the intention of investing into Bitcoin, I am very much positive that after a year or there about that you wanted to use the money to invest, the value will never remain the same again, because inflation will definitely take part it's own share, so if you want to save any money, the best thing to do is that, since it's a money you can do away without, it would be better to hold that money in Bitcoin, through the DCA strategy, or hold it in anything that appreciate in value overtime, so that inflation wouldn't have a negative effect on it.
Lastly, having a steady source of income is very much key in Bitcoin investment, so that you won't have to fall back to your investment for survival, especially when the investment has not blossom.