DCA in Bitcoin depends on the person's income and financial situation. Whimpy and aggressiveness do not only depend on the percentage of discretionary income. There is some difference beginning of investing and after some day later . Since the backup is weak at the beginning, the income may be inconsistent, or you are still learning to handle volatility mentally, then even if your discretionary income is $100, it is okay to DCA from there with low amount . But With time, when all these factors are fixed, the amount of DCA will increase, which is normal.
Yes, the amount to be used to buy Bitcoin into your portfolio actually depends on your mindset and your target on how long you want to accumulate some amount of Bitcoin, if you have that in mind, there will be some seriousness in your investment which means the amont you will be investing on timely interval, it can keep increasing if you are abe to manage your expenses and focus thouroughy on Bitcoin investment because thats the real goal now, use what you have to accumulate what you want within some time.
Think of two people. one has a stable job, 6 months backup, no debt, has a strong belief in Bitcoin, does not panic about short-term fluctuations, in his case, if he DCA from $100 to $70 or even $80, it may be normal. For another person's income is irregular, has almost no emergency fund, and family expenses are unpredictable, anxiety increases for price move it btc . If this person gives $50, that also may be too aggressive. For him, it may be better to start with $20 or $30. An investor should invest with that amount of money where he will not experience any financial stress.
Th amont they are both earning doesent mean anything if the owner is not able to amanage their expenses to cut const and have a larger percentage for Bitcoin investment because the other money used for expenses will be gone forever, while the amount you use to buy Bitcoin will remain as your investment and yoy will make profit from it with time you can hold for long.
