Actually,Yes this the right time to invest and buy some promising altcoin because the whole market has dropped and still at lower level.If you have capital much better to buy more coin and hold for long term.I believe the market will rise again soon as possible.
In calculation, that is the right thing because we have the opportunity to make a profit.
Buying coins at cheap prices and then selling them at high prices is an opportunity.
Market conditions are not known to change again, but certainly that there will always be changes every time and this we have to deal with as well and comfortably as possible.