Take yourselves back to pre-1888, when cars were yet to be invented and horseback was the main mode of transport.
Knowing what you know now, what would you invest in?
"Cars!" you say? Well, that would be fine, but WHICH car? Ford? Mercedes? Toyota? Any of those would be acceptable and produce huge ROI.
But we know now, 130 years later, that even the most popular car manufacturers are nowhere near monopolising the market. The car industry has MANY big fish. But the Transport industry is even more diverse! Add trucks, motorbikes, bicycles, trains, buses, and trams to the pool, and all of a sudden you have to squint to see the slice of the pie that Nissan/Suzuki/Kawasaki is responsible for.
A greater investment than any of those companies would surely be the thing they all travel on. Surely investing in ROADS would be best! Every one of those vehicles, with exception to trains, cannot move without a road.
In the world of cryptocurrencies, PLATFORMS are ROADS! Every successful dapp (vehicle) must be built on top of a platform (road). There will be a point where the platforms are ingrained and popular and investing in 'new' and 'upcoming' platforms will be high risk and low reward. Think, the railway tracks used today are almost identical to those first used, as are roads. But that time is not now.
What platforms are available? Ethereum, NEO, IOTA, and Bitshares are some of the most popular, but arguably Ethereum is the only one I would be comfortable betting would still be around in 5 years time. Icon and Cardano are some up-and-coming platforms which have opportunity and potential to get a foothold in the market.
PLEASE HEAR ME! This is not financial advise. I am not a financial advisor. Do your own research. But, if I may, I suggest START RESEARCHING PLATFORMS! These are the roads of the next 100 years that all vehicles will travel.