it's less risky if you invest your btc in gambling sites it's more stable for your source of income. investing in cloud mining is too risky many cloud mining has offering that you can gain more btc but all of cloud mining is a scam. don't trust cloud mining it's all scam. try investing your btc in gambling sites and let me hear what's your feedback 
Investing in trusted and reputed gambling sites is good in compare to investing in any cloud mining sites as majority of them would turn up to be scam in long run and there is no opportunity to make profits in long term and you will be surely receiving nothing from it but gambling sites can give you regular returns at regular intervals.