many warnings, really? and where exactly are these warnings?
the topics the likes of kuwakduck creates in the speculation board? yes very reliable topics out of the mouth of someone who has been calling the doom of bitcoin with multiple accounts on bitcointalk and elsewhere.
and what are their reasons? calling it bubble just because you feel like it or just because you are scared that price has gone up faster than had anticipated does not mean it is a bubble.
time and time again bitcoin had corrections, big corrections and each time it recovered fast. a bubble doesn't have this attribute to go down 20% and then come back and continue rising. there are no 20% drops/corrections in a bubble.