A crypto CFD (Contract For Difference) is a financial instrument that allows investors to speculate on the price movement of a particular cryptocurrency, such as Bitcoin or Ethereum, without actually owning it.

There are many different brokers that offer cryptocurrency trading, but the best broker for you will depend on your individual needs and preferences. Some things to consider when choosing a broker for trading cryptocurrency include: fees, payment methods, ease of use, secuirty and reputation. It's best to compare the features and fees offered by different brokers to find the one that is the best fit for you.

The viability of cryptocurrency as an investment depends on an individual's risk tolerance and investment goals. Cryptocurrencies can be highly volatile, which might lead both to high profits or losses. They are still largely unregulated by any financial authority, so they carry a higher level of risk than more traditional investments.

It is not possible to determine the "best" cryptocurrency for beginners to invest in, as the appropriateness of a particular investment will depend on an individual's financial goals and risk tolerance. It is important for individuals to thoroughly research and consider their options before making any investment decisions.