True value of data

I’ve been reading, listening and watching and I understand little so far but I’m not perturbed.
Is there not the possibility with various Dapps that end users collatable data, if directed away from the centralised custodian eg. mobile device or network service provider, loses it’s real world value, which is surely only reliable in volume, and therfore centralised entities adopt other techniques, GPS, point of sale data etc to evolve their business model? If so then some form of trust, no pun intended, could exist within the IOTT that’d apps user could use to deposit relevant data so that ,when held in volume, regains value and can be monetised again, benefiting those trustees