VTC is not pumping because of segwit. The volume is off the charts and suggests somebody with very deep pockets has taken an interest in this coin. Price will easily go at least 2x 3x from here with much less money needed.
Looks more like random polo pump to me, not someone taking a serious interest. You think someone was taking a serious interest in Bitcoin plus or Bytecoin or the twenty other complete garbage coins that pumped off the chart in poloniex recently (not saying vert is garbage, just that a polo pump doesn't mean much).