$LYFT is just $10 billion market cap.  So small.  

Somebody is going to takeover/acquire $LYFT.

Softbank?  $GOOGL?  $TSLA?  $AMZN?  $MSFT?

Buying $LYFT for just $15 billion is a drop in a bucket for those big companies.  

$15b = $52/share for $LYFT.