Comments, yes. Concerns, no. I accept the fact that traders are a fact of life. However they tend to bring volatility to the SP. This causes longer term investors to line the pockets of short termers if they overreact to the price increases.
An interesting read can be found by checking the posts that were made at times when the price has spiked, then fallen. Read between the lines and check the comments carefully.
CER Price at posting:
21.0¢ Sentiment: LT Buy Disclosure: Held