Let's see if I can do this in ascii art

                                                        sell
                                         sell            /\
                          sell            /\            /  \
               sell        /\            /  \          /    \   reach goal amount, coast or retire
      sell      /\        /  \          /    \        /
sell   /\      /  \      /     \       /      \      /
  /\    /  \    /    \    /       \     /        \    /
 /  \  /    \  /      \  /         \   /          \  /
/    \/      \/        \/            \/            \/
buybuy buy  buy         buy        buy

             time ->

If you read Andrew Cook's investment tutorial PDFs you should buy when it's low and sell when it's high.  So you need a way to do that with minimal fees.  You take your profit from one cycle and invest it in the next one plus your original principle so you can keep making bigger and bigger investments.  Buy a CD with it or put it in a savings account between cycles.  If you dip in and take some out then you don't have that to invest so it will slow down how fast you get to your goal amount.  I can't imagine just buying and holding.

If you have a profit that varies randomly between 150 and 400%, you can start with $450 and get to $1 million in about 7 cycles.  Once you reach your goal you can start taking money out and have an income from it.  The science or luck is in picking the times to buy or sell.  And maybe some day I can afford an Antminer.  But watch bitcoinwisdom.io, mostly buy or sell when the fast and slow moving averages cross.  Start with $10 and it takes a few more cycles, the more you can start with the more you jump ahead.

The Andrew Cook I'm talking about lived in Chile and started an investment firm around bitcoin.  I have 5 PDFs which may have come from saving his 5 articles from Firefox.  They're loosely titled "How to make money trading bitcoin" but other people have written articles with the same title.  They seem to have vanished, I think somebody's trying to sell them.  There's at least 1 part on Scribd but I'm not going to pay for it since I already have it, I was just trying to find a URL to post here.  If you can get a message to me with your email address I can email the pdfs I have.  You could also search for "Cook Investment firm" which was his company then.  He did make at least 1 post here on bitcointalk.org so I imagine he still has an account here.  There's some stuff on reddit with images on imgur.  He's doing day trading of bitcoin now I guess.