many ways you can do to take advantage of bitcoin. The easiest thing is to do a holding bitcoin.
stretcher way is very easy because in some future time you can take advantage of yan action you do.
You can use Bitcoin to invest in some ICOs instead of waiting for its prices to go up. It is not getting up easily like in the 2016 anymore. Ethereum and litecoin will be the best way to multiply your money
But, if you closely watch litecoin was sleeping for years and with segwit debate it got some appreciations. ETH seems so popular now but it has some hype among crypto users and I am not sure how long people will be having the same. I am already utilizing my fiat by converting into bitcoins and I am not looking for another round of utilization.