To save money on a long term period, you can choose to invest in the large cap coins on the market, thus the first 10 coins on the market. Any of the top 10 coins is more than capable of rising up on the market due to the large investor-support they've got. Those coins take on the rises gradually, hence are very good coins for long term keeping of money and making profits as well.
The question is not where to invest, but how to save money. You can invest anywhere you want but the problem is that how to save money. When you have money you will invest it somewhere, but if you no extra money how can you invest? We should reduce our daily expenses and avoid unnecessary things which need money. We can save that money easily.