So, for the uninitiated (i.e. me) - what does one need to to do invest a small amount of money in this stuff, i.e. less than the cost of one bitcoin or ethereum? I'm considering a comparatively very small (couple of hundred quid, tops) investment to see what happens.
I presume there are sites etc, but it seems likely that there are also spurious and/or rip off sites. So a word from the wise would be appreciated.