There are aspects that make bitcoin users more and more convinced that bitcoin is a good place for investment so now bitcoin prices are rising in the market!
Bitcoin's price is going strong, but not as strong as the alts in the market. Altcoins' price are shooting through the roof. It doesn't matter which alt you pick. Most of them have given phenomenal gains in the last 2 months.
Alt are giving higher returns because of low market cap. With a slight increase in demand it gains value and depreciate when demands go low. Small changes show major changes in alt. Bitcoin on other hand has huge market cap of about $9 billion. Thats why it dont show huge change but a steady and a gradual change.