I have to admit, that I take a more pro-crypto view on this.
Why not do both? Keep in mind that the major crypto-currencies are backed by much more robust infrastructure and experience than DARWINS. Digital currencies are underpinned by technological savvy people, and I would argue that their level of technical experience by far exceeds the level of trading experience of most DARWIN providers. DARWINS do have one benefit however, if they are profitable then you can invest in them whereas it's unlikely that two digital coins with similar attributes and use-cases will be successful in the long run - I feel that bitcoin is an exception to this rule due to it's commercial foothold.
This would only make sense if Darwinex creates a coin with a unique use-case. Instead, DARWINEX may be better off not to compete with these digital assets, but use them instead. This could include making them trade-able or for transactions, but only once specific use-cases are approved by the FCA.
You are right that nobody knows - it could be tomorrow, or it could be in 15 years. Long term trends can contain bubbles within them, and not every burst has to be a bust.
I'm not convinced by this:
Britain's largest online trading platform, Hargreaves Lansdown, is to allow its customers to invest in bitcoin, the alternative digital currency.
Although I have many friends who feel similar to yourself, so I don't blame you
I would be interested why you would rejoice in this. Because people would have lost their money or because your view on this was right. I don't rejoice when funds go bust just because I didn't invest in them.
So although I am a fan of Bitcoin in particular - it has a bumpy road ahead of it, but probably not too unlike many DARWINS here and it will require a certain type of investor to stay with it. The 1st of August 2017 will be key for Bitcoin as it looks more likely that a soft fork will be implemented in order to increase the block size, speed up transaction costs, and make the coin more scalable. Whether this goes well or not, we could end up with two different versions of Bitcoin as old miners may continue to mine the legacy chain. Either way - if it does go well, then I predict a bright future for Bitcoin.
As a result ... I have made the decision today to move 50% of my scalping profits every month into Bitcoin.
Obviously ... this is just my opinion, it's not investment advice, and I could be horribly wrong!