This is the reason why it's not recommended for anyone to invest their savings or the money that they have to feed themselves or their families because you can't always expect to get quick results from cryptocurrencies even though they sometimes can surprise you, and this is for all of them, including Bitcoin. Someone who invests the only money they have in a cryptocurrency hoping that they might get weekly or monthly earnings might get disappointed at some point.
So those who don't know much about the market and cryptocurrencies need proper guidance before they make a final call because if they make a decision based on what they have heard, they might make a wrong decision because there are millions of mouths with different words and interpretations about something. We wouldn't know what the truth until we do some research ourselves.
Good recommendation.
I will say here bitcoin is the best for making investment on cryptocurrencies but bitcoin has the high volatile market conditions and that's is of the big cause people are still facing losses even they are invest on bitcoin. And here investing for the retirement can't be good idea.
Because here the man who will make investment is old person and the emergency situation with the health issues are mostly happens in this period and here even the risks management strategy the DCA method applied their have also risk if the person need the money in the bear season. So I will also not recommended that idea but he can do investment on bitcoin with DCA what doesn't make any impact to his life for the investment.