Although the appeal of limited opportunities is strong, it is also a psychological trap, better known as cognitive biases in psychology. The perception of scarcity can distort our perception of value, so be aware of that. It is wrong to think “I better buy it now, because it is gonna be over soon” (scarcity heuristics), and also is wrong to think “I better buy now because everybody else is doing, so it must be good” (appeal to the masses), but instead you should think more like this “I better buy now, because it is an excellent investment opportunity based on my market research and P/L calculations”.
So lets go to the point @Psybin , I think that buying coins might be more profitable than owning shares, also the investment in coins is more liquid so you will be able to sell them rapidly if you need them for some emergency.
If you buy shares you will have to typically wait at least 5 to 10 years minimum.
Also, you need 1000 GBP (around 1243.75 USD, around 2 BTC) minimum to invest in B shares at least, while investing in coins you can do it on any smaller amount.
Nick calculated a potential 15X on the appreciation of MaidSafe as a company for current investors in this round (if the company succeeds in their mission), which is reasonable. But I think the coins are so undervalued that it could double that at least.
So you weight the pros and cons, and invest accordingly, and never get dragged by the time constraint.