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Investing in the Bitcoin is a wise intention and dumped altcoins have a small effect on the BTC pump. Idea is to understand the market cycle:
Simple cycle: Bitcoin pumps -> cash flow ->Altcoins. Price dumps -> cash flow -> Altcoins In all cases altcoins don't have enough volume for protecting their value without considering the demand.
Everything has its time. The rise of
bitcoin will attract new people to crypto. Later, they will begin to see potential in some altcoins. This will cause an increase in altcoins. Therefore, you can add to your chain -> new money, a small dump of
BTC and
ETH, the rise of altcoins.