Lately, we know the market price of altcoin weakened. Whether or not the purchasing power decreases. Please explain to me what makes you interested in altcoins? And give me an explanation of what you will do to overcome things when altcoin the price dumps?
Altcoins are potentially great investments because they have more chance to grow. Small value coins can easily double in price which compared to bitcoin doubling price, is very difficult. When altcoins dump, don't worry. As long as you did research and believe in the value of your coin then it should very soon go up again. Pumps and dumps are part of altcoin market cycles, learn to profit from it, not get beaten by it.
If price of altcoin is dumped, only two things could happen. Either it will recover or dive more, so keep on monitoring on the situation don't wait that you loss all your token. If you see that collapse of this altcoin is imminent sell it right away atleast you save some rather than losing all. But if you feel market will recover wait for the right time before selling it.