Stock price when the opinion was issued
This is riding a monster trend and now you need to focus on managing your potential downside. Technology is non-mean reverting sector which is great, but the price is at very high valuations now. You may consider setting stops, but would continue to hold. Remember this sector dropped 90% on a sell off back in 2000.
Doesn't own it, but uses it as a benchmark to gauge his performance. You're probably going to get a pullback.
Given that it's such a large ETF, you might want to write some calls on it just a bit higher, and manage it as you go through. Roll up once it gets to the price target. Don't write the call too far out but, say, 1 month out.
Just hit an all-time high today. He loves the tech space, but prefers buying the individual names as a general investing strategy. This ETF is fine and will do well going forward. Caution: the tech trade may become volatile and it's already getting crowded. VGT is all U.S. holdings, so it's better to look overseas, particularly Asia.