For the record, I have no immediate plans to jump off of a bridge.
Is ham radio doomed? No, I don't think so. It may shrink and some aspects of amateur radio may not look like they do today, but I think it will always be here.
For instance, I think hot spots are killing interest in digital voice repeaters. Why be tied to a fixed service that is run by someone else when you can run your own connection to the outside world (as long as you have Internet)?
For that matter, I think repeaters are doomed. I think it will be more and more difficult to get access to high profile repeater sites at the prices amateur radio operators are willing to pay (i.e. for free). "Garage" repeaters will proliferate which may put pressure on repeater coordinators to allow close spacing of repeaters. These garage repeaters, if they stay analog, will also have to connect to other repeaters which takes us back to hot spots or AllStar/Echolink/IRLP.
I think traffic nets are doomed. The older hams who are into traffic nets will slowly die off and so will their nets. I'm not sure traffic nets serve any real purpose any more and the "traffic" I hear on them seems to be mostly self-generated.
I think SSB DXing and contesting and ragchewing is doomed. As more and more people move into areas where they can't put up very good antennas, they will find it more and more difficult to communicate using SSB and 100 watts. Weak signal sound card digital modes, like FT8 will proliferate. Note that this would be a prime opportunity for CW to increase in prominence, but it won't because folks will go for the computer-based modes. As a result, CW DXing and contesting and ragchewing is also doomed.
I think ARES/RACES/SATERN/Skywarn are doomed. The served agencies will have less and less use for amateur radio as they become more and more reliant on infrastructure-based communications systems and social media.
The prepper aspect of amateur radio will flourish. As folks figure out that their cell phones and Internet access could disappear in a heartbeat, they will take greater interest in amateur radio. Sadly, without some training and familiarity in how to use their radios, these preppers will find that they still can't communicate. Note, this is a prime opportunity for the ARRL and every local amateur radio club to start addressing this aspect of amateur radio. These organizations need to start catering to the prepper crowd. I take the recent QST article about stockpiling water and food as a positive sign that maybe one person at the ARRL gets it.
So, chew on those topics for a while.