honestly, i dont believe in any of those that have "coin" "block" "chain" or any other of those buzzwords in there main business model, unless they have reliably proven working.

btw, for filecoin i see one notable problem: its essentially renting distributed data space. eventually the price of this will align with the price of classic data storage: if its too cheap, "miners" cant compete and will die. if its too expensive, people will switch over to classic data storage or buying hard drives themselves. nice idea, not practical. plus, there is a huge problem: essentially, you are renting storage "in the network". you do not know who is storing it, so there is no trust that comes with "i know the other party, i've paid them, so they do this else they need to pay back or i sue them." here, this works only limitedly. plus, the value of a filecoin. it bears the issue all cryptocurrencies have, that there is no value unless someone pays you for giving them your coins, and due to their limited use i dont know if this every can become something valuable.

in the end you would have bullions (sic!) of filecoin, but no need for data storage so no value, or the other way round, data storage without end but noone wanting to rent it.