Well here is my opinion, if you don't want to gamble with your investment, Then invest in Real Estate, Its value will only rise, But the rise will be gradual and slow, Alternatively you can invest in gold again this is a safe  option, But it has a chance to increase rapidly in the near future, The Down side is keeping it safe. Investing Online in coins like Bitcoins is bit risky, There are fluctuations of $10-60 on daily basis and you have a weak heart, I don't recommend you to invest large amounts which you can't afford to lose, But if have patience and take it like Real estate, In next 10-20 years you can expect atleast 10-20X of your investment and finally at last comes investing in banks, They are the least safe, As soon as general public becomes aware of the fraud they do only daily basis, It will go down in flames.