Understand that the other tickets do not affect your tickets in most lotteries.
Many people erroneously think that they have better chances of winning when fewer people play, but this is not true unless you are entering a raffle wherein a winning ticket is pulled from all the entries.
The odds of the lottery's random numbers matching your ticket's numbers are not affected by the number of people who have tickets. Think of it this way: If only one person bought just one ticket for the lottery is that person guaranteed to win? No.
However, the fewer people who play, the lower the odds of multiple winners are.