The price of altcoins are technically at the bottom now and most of the altcoins have gone minus 80% of what was their price during the last bullrun. Therefore this is actually the best time to fill bag with altcoins because the altcoins bullrun may come at anytime.
I agree with your point of view, this is a great time to buy altcoin to prepare for the growth season in the end of this year and early 2020.
The cryptocurrency market is showing clear signs of recovery so this is a good time for investors to return to the market and choose for themselves good coins.