You just need to make sure that you are accumulation Bitcoin cycles correctly. Don't slow down your Bitcoin accumulation until discretionary income is maintained because if you can't assess the timing correctly, buying at the wrong time will increase the average value of your portfolio.
Can you please educate us when you think is the wrong time for investing in Bitcoin, if actually there is something like that. Being scared of your average cost of your portfolio increasing will make you skip buying bitcoin even with DCA method? I don't agree with you on this as I don't think there is a wrong time for an investor to buy bitcoin. I find this your teaching misleading. Your teaching is also encouraging timing the market before buying bitcoin which is also against the ethics of investors and the principles of this thread.
There is nothing like wrong time for investing in Bitcoin because Bitcoin can be accumulated anytime if your discretionary income is available and ready so there is nothing wrong and I think what the dude was trying to say is buying when the price of Bitcoin has surge which is wrong because as an investor you don't care if the price of Bitcoin is high or not because the dollar cost averaging (DCA) method is already there to help an investor accumulate or buy at any given price.
What I think the idea of buying Bitcoin at the wrong time is actually twofold. First history shows that Bitcoin prices are always cyclical. For example those who bought at $19k in December 2017 have been able to return to profit after about 3 years.
Second DCA is actually the most effective method to reduce this fear of wrong time . Market timing is not fail proof for most investors on average. If you invest a certain amount every month or every week then you are never buying at the top and you are never missing the bottom. This balances your average purchase price.
Third the saying there is no wrong time is true in one sense but it has a condition. If you are looking for short term profit then yes there is such a thing as wrong time. But if the perspective is 4 5 years or more then history shows that buying at any time has become the right decision. Because the price of Bitcoin is constantly rising.