ABAP will not die for sure. Nothing dies in the IT industry completely. Even mainframes are still there. There is some scope of everything in some corner in some projects. Some clients don’t upgrade because of the cost. Some people don't care to upgrade.
But new development would be on new technology. If you persist with the recent technology, you'd continue to be doing maintenance i.e some changes, add 1–2 field, fixing bugs, maintaining labels/descriptions etc.
Now the businesses have much maintenance work on ABAP. So you may find managers/architects saying that “ABAP would be there. You could spend your life on ABAP.” Someday in the future, if the corporate wouldn’t have worked, it may strictly ask you to move on some different technology or terminate you. Companies don’t care much.
If you would like to try and do some new implementation upgrade to sap ui5 or native Hana (Open SQL/ native SQL ). Coding would still be there but its type is modified. Sometimes upgrade to new technology conjointly satisfy your greed in terms of cash and ability (As you're doing one thing new/some amendment in life).
Some of the ABAPers already moved to Hana. Some would be moved in the near future. Some would be emotional by firms in the next 5 years. Rest few would even have some scope in ABAP. Low demand would be there also as low offer. So don’t worry too much.
It depends on what you choose. Moreover, ABAP would still be there in the future in some type, in some maintenance project with some rigid client.