You made a valid point which I agree. However, I do not see this one as an investment. It costs nothing to abort and find another entry if this one fails. Worst case a lost chance.
The reason I see it that way is cause I think we have a bubble... hence it'll crash at 'some' point; all you have to do is to throw enough darts, and one ends of hitting the target for decent gains.
If the valuation was more reasonable, I certainly would have been strict with entry and exit.