Policy and Law will depend on each country.
Today, there are some countries that openly accept or reject cryptocurrency in their country. This is related to the various considerations in their respective countries which are certainly adjusted as well as the conditions of their country, including the system.
However, for countries that have legalized Bitcoin and other cryptocurrencies, both are not a problem anymore.

This will really depend on each person. However, We cannot avoid if there are many people (especially for Beginners) who indeed only rely on speculation compared to analysis. However, every speculation is certain to have its own losses. What needs to be considered is how we take the risk.

We cannot avoid this, money laundrying can happen in many fields, not only Bitcoin.

Everything will have pros and cons, will have positive and negative sides, will have advantages and disadvantages.
And how we take the decision and do it will really make us take the sides. I personally will prefer to take the advantages and positive sides.