@michelle, don't forget is a Bitcoin discussion thread, using the word crypto may implies including altcoins which is not included in the topic of discussion.
I think you are getting something wrong here. Bitcoin is the crypto itself. Every other coins you see today were built around bitcoin. Many people only know bitcoin when they hear the word crypto. There are people out there today who doesn't know that other coins exist, so when they hear about crypto the first thing that comes to their mind is bitcoin. Bitcoin is the crypto currency, if you are not aware of this know it today. If he had mentioned alt coins then you can say he is referring to other coins. So @Michelle is not talking out of point when he used the word crypto. If you see a newbie that has no knowledge about bitcoin investment, ask him or her what is crypto, I bet you the person will mention bitcoin.
In the earlier part of this thread, if I'm not mistaken, I think @JayJuanGee stressed the need to avoid using the word "cryptocurrency" when generalizing Bitcoin and the other coins out there. The reason being that while many funny things have been done leveraging on cryptocurrency, Bitcoin have remained clean since inception and people tend to taint the image of Bitcoin whenever they unleash their clandestine plots.
Not just that, if you look at this thread it is strictly on how one can accumulate bitcoin through DCA, lump sum, and buying at the dip. Which means this thread generalize on investing for the future and sound investment practice. This is why we need to be specific with the word "bitcoin" because it is only bitcoin investment that when you hodli for long it gas the potential to generate good profit in the long run, that can turn your life around. Altcoins are not to be kept for long, and it is useless to DCA on altcoins, because you are wasting time and money, that you will regret later, when they end up valueless. Altcoins are not investment, but they are used for gambling because their prices can be manipulated at anytime, and you cannot be your own bank with altcoins because all their wallets are closed source, and the consequences for gambling is great loss, and frustration. Bitcoin is King Daddy.