hello guys i know a bit about bitcoin but not sure if it is a good idea to buy im trying to save some bitcoins on my wallet 2-3 years will sell them .

not sure if the price will go up or not so im askin the expert what do you think. i got about 700 dollars going to buy 2 bitcoin or 3.

but i will start will low investment how much shall i get  for my 75 sterling pounds  i checed on preev it shows 0.4066  sould i get that price
people sometimes asking me 1:1 what does that sign mean im confuse.
where can i exchange my paypal fund to bitcoin