I take part in lotteries but I usually do not make a lot of hope to win a lottery. Participating n the lottery is the easiest thing but getting a win out of it may be the most difficult thing. By the way, its fun participating in online lotteries.
Gambling which is based on luck with little chances to secure winning depending on how your predicted all all of luck, this is to say your experience gaming strategy can not guarantee you that so not in a lottery where it is shuffled until they generates a winning you can hope on.While participating in the lottery, just get your mind ready to celebrate whoever that win feel hopeless because the pool is too broad to think you will be the lucky one amongst all
Then when it finally gets to you, take it as lucky surprise.
What if, I get a chance to participate in a lottery without any investment?
Do you mean investment with the prize won?If yes, that is your personal business perhaps, you do not have to win a lottery before you can invest or have plans with your incomes.
Hoping on winning so that you can invest can just be a dream inside of another dream.
If any gambling site offers, free of cost entry in the lottery, i would definitely not miss that one. 
While I don't need to promote a gambling site here, I will ask you to do your research and then you could find some online casinos with jackpot offers. That may serve for your interests In gambling sites that offers lottery features.