Yes I think you can continue to invest, despite now that price of coins are very low, some cryptocurrencies price has dropped much, though market is not suitable, prices are very low for sale, but you can also be profitable when market will rise at you suitable price. So go ahead and invest.
The most successful investors buy during these times, when there is fear instead of greed and blood running down the streets. It is important to stay calm and focused and buy everything that is undervalued. This means projects that have a product, strong use case and an existing (and ideally growing) customer base.