Investing is very good if you invest them at a right time and at a right place and it will help you in growing your money in long run but proper care and research should be done before investing.
Actually every time is a right time. What matters here is taking care of the chosen investment.
Succesful investment today by some of the succesful persons really put some seriousness and effort to make their investment grow and become a success one. Honestly, even they already reached the status of success still they are putting lots of effort to make their investment much stronger.