Bitcoin is back down to $ 7500 and altcoin is also following Bitcoin, is this to buy BTC when it is going down badly or waiting for the price of $ 7,000,
If you have money ready to invest in bitcoin why not buy now some and wait if the price go down from $7k then buy again and hold then wait until price increase again. Investing is full of risk if you are afraid to lose your money then i think crypto is not for you. Nobody knows when the price go down or increase or even what is the bottom line of the price drop,all we can do is to grab the opportunity if we think it is the time to buy then go on.
the investment method you say is good enough by dividing the funds you have to make a purchase if the price drops from the first purchase, but it needs to be careful and careful especially when making a second purchase because it requires the right percentage of price reduction