For everyone, the concept of long-term investment is different. Some one year is considered a long term, and some are 20 years.
Crypto currency is unpredictable. You must always follow the news and the course. To make the right decisions in time
The benefit of saving bitcoin for a long time, is like bitcoin has the potential to become the next generation gold since it is limited and it has many advantages just like gold, and the price of the bitcoin increases overtime, so you could have it right now at $900 and two years from now it could reach $1000.
Saving bitcoin is good for people who loves to take risk, it's not a savings that when you need it you can spend it directly, as time passes the value of your bitcoin will change and the worst thing will happen if you see a losing value. We all aim for better income and see a growth in value but since we can never ascertain what will happen in the future, we have to be ready of the negative outcome as well.