eToro is reportedly the best platform for trading crypto (
https://www.etoro.com/en-us/). Also previously mentioned was RobinHood (
https://robinhood.com/us/en/); I personally know people who use the RobinHood app and have regarded it highly; that said, there are some regulatory issues that that app is facing, and there is a movement to ban it in the state of Massachusetts (
https://boston.cbslocal.com/2021/04/16/robinhood-app-massachusetts-galvin-securities/). I think that the regulatory issues will blow over, but you never know.
Full disclosure: I have an economic interest in eToro.
My general opinion of crypto is that it is like a pet rock, if anyone remembers that craze. Crypto is nothing but a random arrangement of bits with an algorithm behind it -- if you can get someone else to buy your bits for more than you paid, then fine, but they have no value in and of themselves, only what someone else will give you for them.
Gold and silver are similar, a random arrangement of protons and electrons, and in the abstract, the mining process is similar (convert energy into the end product), and they are only worth what someone will pay you for them, but at least precious metals have non-market utility; specifically jewelry is pretty to look at, and they are useful in certain industrial processes. The same can not be said of crypto.
Fiat currency is much like crypto, it is basically random pictures of dead presidents or a random arrangement of pixels in a spreadsheet somewhere, and is only worth the goods and services someone will give you for it. Its store of economic value comes from the fact that it is basically a note that says "I did this for person A, so you, as person B, should do this for me". It is also quite entrenched, and so that gives it what economists might call "goodwill value".
Food, water, energy, and land (and similar things) are the only things with real value, as they have utility in the absence of a greater fool to buy them down the line. Even gold or silver, much less crypto, can't be eaten or burned as needed.
Circulating back to crypto, it is my opinion that it will become entrenched. Moreover, unlike fiat currency, there will be a strict limit on the number of coins for a particular crypto, and it will be well-known when that limit is reached. This will give it a slight advantage over fiat currency (the inability to print more of it by fiat).
That said, there are problems at the present time. It is too volatile to be a store of value. Bitcoin, for example, went from about 60K to 45K in a few days (these are rough numbers from memory and not intended to be exact, just illustrative). That's real money. Fiat currencies do not do that. A 1% move in a fiat currency is considered a big deal.
Moreover, while the supply of say, bitcoin, is limited by algorithm, the supply of coins in general is not limited. Anyone with the tech savvy can create a new coin. For example, dogecoin, which was created as a joke, is up some 400% in recent times. This is akin to discovering that all the gold has been mined, so let me create something else in the lab that people may or may not find as shiny. It is a backdoor way to dilute the limited supply, and in a sense, is like the 100 or so fiat currencies around the world, or whatever it is.
So, my overall opinion is that these coins will find a stable value at some point in the future (just like tulips have). We just don't know when or at what point relative to other assets. So, I view them as nothing more than trading/gambling devices at this time.
HTH. FWIW, I am an economist and professional trader, but my opinions aren't really more valuable than anyone else's. Just throwing it out there.