That's because there is hardly any bubble this time. Last time it $10 to $260 in relatively short time period. Price should be at least at $500 before we can even began to talk about bubble.
I think the "bubbling" is not neccessarily the amount of price increase but what can be seen in the bid depth and the lack of capitulation moves and tested support levels. It is just nonstop buying (hence 'overbought') and way up in the bollinger band.
my thinking as well. i don't buy this "price has to be n times the previous bubble top to mention it" thinking.