Keeping your Bitcoin in an exchange is really an unwise thing to do because if anything happens to that exchange in question, like hacking or internal theft, or like in the case of FTX, just know that you asset is gone, that's why it's advice to store your Bitcoin in a self custodian wallet like electrum where only you have access to, and one funny thing is that, most investors have heard of this statement before which is not your key, Not your coin, but they really don't understand what that statement mean, but in essence of all am trying to say is that keeping our Bitcoin in an exchange is a terrible mistake we should avoid by all means because once that exchange goes down, at that moment, your asset are gone.
So if Bitcoin.com97 was saying that every week he was going to be buying $10 worth of bitcoin, then how frequently are you suggesting that he withdraws his bitcoin from the exchange? Every week? month? quarter? twice a year? yearly? or something else?
If Bitcoin.com97 sticks to $10 per week, then monthly withdrawals would be $40 to $50 each time. Quarterly would be around $130. Twice a year would be $260. Yearly would be $520.
What levels of withdrawal are you recommending Futurexxx?
In my own opinion, it should be done at the earliest opportunity, but the major problem here is the amount involved, because $10 is too small to be doing that weekly because the fees alone will be reducing the fraction of the Satoshi bought.
So on that note, due to the amount involved, I think that the logical thing to do is to do it in his second acquisition, which is $20, wish might cost him only $0.50 in fees.
I think that any amount of money is not less to invest. Because many people can afford to invest $100 and many can afford to invest $10. It is better to have some amount than nothing. There are many people whose monthly or weekly salary is very less. At the end of the month or week, they have very little money to invest, so continue investing with it. If you invest $2, it is not less.