Well the first thing to realise is you don't have to increase your to increase your wealth, the value of increasing is enough. In an ideal world you would increase your and also have the price increasing. You can try trading or mining or campaigns, check out the and you'll find plenty of information on them
Trading is one of the best way of increase your. I mostly invest my in different ICOS and other altcoin that are added in exchanges, i mostly earn good amount of from trading alt coin. there are also so many other sources of , but i will also suggest you trading that is more easy and reliable way of increasing your bitcoin but if you want to earn tension free then i think long term trading is the best source.