There are countless ways to make money from Bitcoin, the biggest being, of course, trading.
I hear many saying they don't mess with altcoins...
Why not? Altcoin trading is one of the most popular trading methods used today by the community. However, if trading is not your cup of tea, I would advise you stay out of it then. It is very easy to loose a large sum of money over a very short period of time.
for some big time investors they consider bitcoin as their long time preservation or long term investment, they just buy whenever they want and sometimes they actually set buy limits at low prices or even wait til the price drops then buy, the next thing they do was just left it in their cold storage to freeze and then let the time pass buy, in other words they just hold it.
I agree, holding has become one of the longest, but surest ways to earn bitcoin. It takes time and patience, but it can surely pay off, depending on what price you have purchased your
BTC.
If you have a special set of skills you would like to advertise, I would advise you to look up the marketplace topic and browse through the services there. Selling your services is also one of the best ways to make money through BTC, and there is also minimal risk attached to it. The amount of money you make is solely dependant on the amount of work-hours you are willing to place into your job.