Although there are more ways to prove the ownership of this account and won't be a difficult task for me.
Would you mind doing so? You have a significant gap in your activity from June up until March of this year. An inactive user who suddenly becomes active and then asks for a loan can be quite a risk.
Here's another address I've found, can you sign a message with this one?
Bitcoin Adress: 1May3TVRzjg2cYut5Pn1uJzKFWk9MjyHNH
Just went though my last blockchain.info account and unfortunely none of the addresses are there.
Signing a bitcoin address will be difficult for me as I'm not using my own for a very long time. Mostly they are from either exchange or other sites that don't provide control over addresses. Although there are more ways to prove the ownership of this account and won't be a difficult task for me.
You know though that signing a staked address
is the best way to verify the ownership.
Sorry to say this but a member like you sounds quite impossible not to have a wallet that he can sign at any moment.
On the other hand, why don't you ask from
TF and help to his test? You won't need any kind of Collateral as he say..

Seriously mate, I know how important it is to prove ownership after a long inactivity period but it has to be done some other way as I'm not having those bitcoin addresses. I mean none of them.
Second point: That's only for legendary member and I'm not even near it.
https://bitcointalk.org/index.php?topic=3132539.msg32693310#msg32693310 Can sign this Ethereum address that I still have
Signature:
{
"address": "0xc526271fe2963766687b7a0c60dbefc3924ad665",
"msg": "Hi, This is SM23031997.\nToday is 13-05-2019",
"sig": "0x85971f3536263e7693f216778fb7b04cc91dcd18126c7af393aff5d954ba0ca177aded8e51cfc91733a29c73b089fcb941bf2be143dbbe7d9b068ac7837fd07a1b",
"version": "3",
"signer": "MEW"
}