I would suggest that you continue on trading. For me it is the most safe way to grow bitcoin rather than investing it at HYIP's because most of them are scam but not all, others will last for month but will be eventually become a scam. Or gambling it because we all know that no one gets rich from gambling.
Its better to be into trading to be on the safer side, because all other methods of growing bitcoin has got more risk than trading. To make profit with trading observation of price volatility is much needed. HYIP's will be good at the start but when they don't get the targeted investors it goes under the scam list. Also user who expect growing can continue with trading, others can try with the high risk methods.