Basically we don't know the risk in every site if you invest money in a site first is you don't know if the site was trusted there are site that can give you small profit but many site are just scamming people who invested.
I think why its risky because its like probability. you have only 2 chances. you may gain or loss your money when you invest it. nowadays numbers of scammers is higher than the trusted sites.
You can avoid those scammers by not investing your bitcoins anywhere and simply keep them safe in wallet and wait for the price to go higher in future and in that case there is no risk of loosing your money and will give you only good returns on your investments in future.
Keeping money in your purse is not an idea, rather than worrying about scammers, be careful, then take advantage of your money to make a profit. Business is not a difficult job, use your intelligence and make money.
You can avoid scammers if you do a good research before investing your money and you may find many good place to invest your money from where you can expect good profits in long run and I will choose to invest my money in trading instead of keeping my bitcoins idle in my wallet.
Yes and its always good to invest time in carrying out good research before investing our money anywhere and even if you are investing it in altcoins then also you should know which is the good coin to invest which can give you good returns in future.
