Does every blockchain need a token?

No but in general, public permissionless blockchains prefer tokens for some real benefits : One is that tokens can be utilized to prevent network attacks. If you have to spend some tokens for each transaction, than it is very unlikely that you’d spend millions of tokens for attacking the honest nodes to fail them.

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Is crypto coin a good investment?

Investing in crypto assets is risky but also potentially extremely profitable. Cryptocurrency is a good investment if you want to gain direct exposure to the demand for digital currency . A safer but potentially less lucrative alternative is buying the stocks of companies with exposure to cryptocurrency.

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