Guys, I've been reading this crazy stuff posted by someone called "Shelby Moore" (whose messages were recently re-posted in the WO thread by user THX 1138), about how all coins held in SegWit addresses will be donated to miners, as they are free-to-spend coins in the legacy (pre-SegWit) blockchain, and only the coins held in legacy addresses will stay intact and belonging to their owners (private key holders). Supposedly, this attack will occur near the 2020 Halving event and will wreak havoc, resulting in the legacy chain being resurrected from the dead and becoming the dominant one, and the SegWit chain disintegrating into oblivion and causing a massive BTC price drop to near-zero.

What do you make of this?

Some more Qs:

1. Is it possible to move any of our coins held in SegWit addresses to legacy addresses (so that they would belong to the legacy chain if the above attack does happen)? Does the fact that, at some point in their history, those coins were held in SegWit addresses, taint them in any way? Would they still be considered as fully belonging to the legacy chain once moved to legacy addresses?

2. Would you do it? Do you think it's worth it?

3. Do these questions even make any sense?

4. Am I wasting my time with all this?

Thanks for any insights.