If you need to grow bitcoin i suggest not to put it on any investment sites now because it's very tempting to them to turn to scam because the price of bitcoin is continue rising. So i were you i will just increase my bitcoins by signature campaigns.
What the relationship of the price btc is rising and the investment place to be a scam?if your means about the value will be more caused by the rising i can say no for that, because the scammer are not cares about that.
Even if the price will rise or not as long as the certain business you have invested your funds are seeing they are losing in their operation there is always a big possibility that they will scam your investment but that does not happen most of the time when the price will rise because that means a profitable business will increase its profit also once the price increases.