Bitcoins are the largest cryptocurrency all over the world but it's also risky to buy bitcoins because of the variations in the value of the bitcoins. However people all over the world prefer to buy bitcoins among other cryptocurrencies because they think that a lot of variations in the value of bitcoins will be profitable in bitcoins trading.
Other than trading another option for the people is to mine the bitcoins, for this people uses many options and one of the most common bitcoin mining method is having a large GPU machine to solve a Blockchain but this is very expensive and it requires a lot of electric power so in many countries it's useless to do it because of l having expensive electric power.
Some people do business and provide services or products and get bitcoins in return instead of money but it's as much risky as bitcoins trading because of rapid changing of bitcoins rates.